A152769 - cp's OEIS frontend

A152769 Numbers n such that pi(n) is nonprime.

n	a(n)
1	1
2	2
3	7
4	8
5	9
6	10
7	13
8	14
9	15
10	16
11	19
12	20
13	21
14	22
15	23
16	24
17	25
18	26
19	27
20	28
21	29
22	30
23	37
24	38
25	39
26	40
27	43
28	44
29	45
30	46
31	47
32	48
33	49
34	50
35	51
36	52
37	53
38	54
39	55
40	56
41	57
42	58
43	61
44	62
45	63
46	64
47	65
48	66
49	71
50	72
51	73
52	74
53	75
54	76
55	77
56	78
57	79
58	80
59	81
60	82
61	89
62	90
63	91
64	92
65	93
66	94
67	95
68	96
69	97
70	98
71	99

[1, 2, 7, 8, 9, 10, 13, 14, 15, 16, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 37, 38, 39, 40, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 61, 62, 63, 64, 65, 66, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99]

cp's OEIS Frontend

A152769 Numbers n such that pi(n) is nonprime.

Table of values

List of values

n	a(n)
1	1
2	2
3	7
4	8
5	9
6	10
7	13
8	14
9	15
10	16
11	19
12	20
13	21
14	22
15	23
16	24
17	25
18	26
19	27
20	28
21	29
22	30
23	37
24	38
25	39
26	40
27	43
28	44
29	45
30	46
31	47
32	48
33	49
34	50
35	51
36	52
37	53
38	54
39	55
40	56
41	57
42	58
43	61
44	62
45	63
46	64
47	65
48	66
49	71
50	72
51	73
52	74
53	75
54	76
55	77
56	78
57	79
58	80
59	81
60	82
61	89
62	90
63	91
64	92
65	93
66	94
67	95
68	96
69	97
70	98
71	99

n	a(n)
1	1
2	2
3	7
4	8
5	9
6	10
7	13
8	14
9	15
10	16
11	19
12	20
13	21
14	22
15	23
16	24
17	25
18	26
19	27
20	28
21	29
22	30
23	37
24	38
25	39
26	40
27	43
28	44
29	45
30	46
31	47
32	48
33	49
34	50
35	51
36	52
37	53
38	54
39	55
40	56
41	57
42	58
43	61
44	62
45	63
46	64
47	65
48	66
49	71
50	72
51	73
52	74
53	75
54	76
55	77
56	78
57	79
58	80
59	81
60	82
61	89
62	90
63	91
64	92
65	93
66	94
67	95
68	96
69	97
70	98
71	99

n	a(n)
1	1
2	2
3	7
4	8
5	9
6	10
7	13
8	14
9	15
10	16
11	19
12	20
13	21
14	22
15	23
16	24
17	25
18	26
19	27
20	28
21	29
22	30
23	37
24	38
25	39
26	40
27	43
28	44
29	45
30	46
31	47
32	48
33	49
34	50
35	51
36	52
37	53
38	54
39	55
40	56
41	57
42	58
43	61
44	62
45	63
46	64
47	65
48	66
49	71
50	72
51	73
52	74
53	75
54	76
55	77
56	78
57	79
58	80
59	81
60	82
61	89
62	90
63	91
64	92
65	93
66	94
67	95
68	96
69	97
70	98
71	99