how many games did olajuwon have with at least 20 points and 20 rebounds

Hakeem Olajuwon had 42 games played with 20+ points and 20+ rebounds.

Interpreted as:

How many regular-season games did olajuwon have with at least 20 points and 20 or more rebounds?

	NAME	DATE	GP	PTS	REB	TM		OPP	MIN	AST	STL	BLK	FGM	FGA	FG%	3PM	3PA	3P%	FTM	FTA	FT%	TS%	OREB	DREB	TOV	PF	+/-
1	Hakeem Olajuwon H. Olajuwon	1/19/1985	1	34	20	HOU	vs	UTA	40	4	3	0	13	23	56.5	0	0		8	12	66.7	60.1	11	9	2	2
2	Hakeem Olajuwon H. Olajuwon	2/14/1985	1	30	25	HOU	@	NYK	44	0	3	3	10	20	50.0	0	0		10	18	55.6	53.7	15	10	4	5
3	Hakeem Olajuwon H. Olajuwon	3/5/1985	1	20	25	HOU	@	DEN	48	2	1	7	7	22	31.8	0	0		6	8	75.0	39.2	9	16	2	5
4	Hakeem Olajuwon H. Olajuwon	3/19/1985	1	24	21	HOU	vs	CHI	42	0	0	4	12	20	60.0	0	0		0	0		60.0	8	13	4	4
5	Hakeem Olajuwon H. Olajuwon	3/22/1986	1	33	23	HOU	@	NYK	35	2	7	4	12	18	66.7	0	0		9	15	60.0	67.1	9	14	7	4
6	Hakeem Olajuwon H. Olajuwon	3/26/1986	1	27	21	HOU	@	IND	42	1	2	8	12	31	38.7	0	0		3	5	60.0	40.7	7	14	3	4
7	Hakeem Olajuwon H. Olajuwon	4/1/1986	1	34	22	HOU	vs	GSW	43	5	4	7	16	21	76.2	0	0		2	7	28.6	70.6	8	14	4	3
8	Hakeem Olajuwon H. Olajuwon	11/8/1986	1	25	21	HOU	vs	SAC	40	6	4	4	12	21	57.1	0	0		1	2	50.0	57.1	10	11	5	3
9	Hakeem Olajuwon H. Olajuwon	12/16/1986	1	24	21	HOU	vs	PHX	42	1	0	0	8	16	50.0	0	0		8	15	53.3	53.1	10	11	3	3
10	Hakeem Olajuwon H. Olajuwon	1/10/1987	1	25	20	HOU	vs	DAL	41	4	2	3	11	24	45.8	0	0		3	6	50.0	46.9	10	10	2	5
11	Hakeem Olajuwon H. Olajuwon	1/7/1988	1	30	20	HOU	@	GSW	40	2	2	6	11	23	47.8	0	0		8	11	72.7	53.9	7	13	0	5
12	Hakeem Olajuwon H. Olajuwon	1/16/1988	1	25	20	HOU	vs	IND	36	2	2	3	8	16	50.0	0	0		9	10	90.0	61.3	4	16	3	5
13	Hakeem Olajuwon H. Olajuwon	2/18/1988	1	20	20	HOU	vs	LAL	42	0	3	1	7	19	36.8	0	0		6	7	85.7	45.3	5	15	4	4
14	Hakeem Olajuwon H. Olajuwon	3/10/1988	1	28	20	HOU	vs	POR	41	3	6	1	11	25	44.0	0	0		6	10	60.0	47.6	7	13	4	5
15	Hakeem Olajuwon H. Olajuwon	3/26/1988	1	29	21	HOU	vs	POR	43	3	4	5	11	27	40.7	0	1	0.0	7	10	70.0	46.2	9	12	2	5
16	Hakeem Olajuwon H. Olajuwon	4/12/1988	1	26	20	HOU	@	SAS	38	2	3	2	9	20	45.0	0	1	0.0	8	12	66.7	51.4	5	15	10	3
17	Hakeem Olajuwon H. Olajuwon	2/21/1989	1	29	25	HOU	@	NYK	41	3	1	3	13	24	54.2	0	1	0.0	3	7	42.9	53.5	8	17	3	4
18	Hakeem Olajuwon H. Olajuwon	3/10/1989	1	29	22	HOU	vs	DAL	42	1	2	3	11	18	61.1	0	0		7	9	77.8	66.0	3	19	2	5
19	Hakeem Olajuwon H. Olajuwon	3/14/1989	1	40	24	HOU	@	SAC	42	4	1	4	14	28	50.0	0	0		12	16	75.0	57.1	8	16	4	2
20	Hakeem Olajuwon H. Olajuwon	3/21/1989	1	36	23	HOU	vs	DEN	45	2	3	2	16	31	51.6	0	0		4	6	66.7	53.5	5	18	9	4
21	Hakeem Olajuwon H. Olajuwon	11/11/1989	1	24	21	HOU	vs	UTA	42	2	5	12	10	22	45.5	0	0		4	9	44.4	46.2	7	14	5	5
22	Hakeem Olajuwon H. Olajuwon	12/12/1989	1	25	20	HOU	vs	PHX	40	5	3	9	11	26	42.3	0	0		3	6	50.0	43.6	2	18	2	5
23	Hakeem Olajuwon H. Olajuwon	12/17/1989	1	32	25	HOU	vs	ORL	43	2	3	10	10	18	55.6	0	0		12	20	60.0	59.7	6	19	5	4
24	Hakeem Olajuwon H. Olajuwon	12/22/1989	1	29	21	HOU	vs	SAC	44	1	4	5	9	21	42.9	0	0		11	14	78.6	53.4	8	13	3	3
25	Hakeem Olajuwon H. Olajuwon	1/20/1990	1	23	21	HOU	vs	WAS	39	5	1	4	10	19	52.6	0	0		3	5	60.0	54.2	8	13	4	1
	Average		1.0	28.5	21.3				41.4	2.8	2.4	4.3	11.2	21.5	52.1	0.0	0.1	0.0	6.1	9.0	67.8	56.0	6.6	14.7	3.7	3.9	24.0
	Total		42	1,195	896				1,738	117	101	182	470	902	52.1	0	5	0.0	255	376	67.8	56.0	279	617	156	165	+24