A237990 - cp's OEIS frontend

A237990 Numbers m such that the numbers of primes, even positive integers and odd positive integers less than or equal to m are all even.

n	a(n)
1	4
2	8
3	16
4	20
5	40
6	44
7	56
8	64
9	72
10	80
11	92
12	96
13	108
14	116
15	120
16	124
17	132
18	136
19	140
20	144
21	148
22	152
23	156
24	164
25	176
26	184
27	188
28	196
29	200
30	204
31	208
32	224
33	232
34	240
35	252
36	256
37	264
38	268
39	272

[4, 8, 16, 20, 40, 44, 56, 64, 72, 80, 92, 96, 108, 116, 120, 124, 132, 136, 140, 144, 148, 152, 156, 164, 176, 184, 188, 196, 200, 204, 208, 224, 232, 240, 252, 256, 264, 268, 272]

cp's OEIS Frontend

A237990 Numbers m such that the numbers of primes, even positive integers and odd positive integers less than or equal to m are all even.

Table of values

List of values

n	a(n)
1	4
2	8
3	16
4	20
5	40
6	44
7	56
8	64
9	72
10	80
11	92
12	96
13	108
14	116
15	120
16	124
17	132
18	136
19	140
20	144
21	148
22	152
23	156
24	164
25	176
26	184
27	188
28	196
29	200
30	204
31	208
32	224
33	232
34	240
35	252
36	256
37	264
38	268
39	272

n	a(n)
1	4
2	8
3	16
4	20
5	40
6	44
7	56
8	64
9	72
10	80
11	92
12	96
13	108
14	116
15	120
16	124
17	132
18	136
19	140
20	144
21	148
22	152
23	156
24	164
25	176
26	184
27	188
28	196
29	200
30	204
31	208
32	224
33	232
34	240
35	252
36	256
37	264
38	268
39	272

n	a(n)
1	4
2	8
3	16
4	20
5	40
6	44
7	56
8	64
9	72
10	80
11	92
12	96
13	108
14	116
15	120
16	124
17	132
18	136
19	140
20	144
21	148
22	152
23	156
24	164
25	176
26	184
27	188
28	196
29	200
30	204
31	208
32	224
33	232
34	240
35	252
36	256
37	264
38	268
39	272