A120943 - cp's OEIS frontend

A120943 Numbers n such that merging first n digits in decimal expansion of Pi (A000796) gives a squarefree composite number.

n	a(n)
1	3
2	5
3	8
4	10
5	11
6	12
7	13
8	14
9	15
10	16
11	18
12	19
13	21
14	22
15	23
16	25
17	27
18	28
19	30
20	31
21	32
22	34
23	39
24	40
25	41
26	43
27	44
28	45
29	46
30	48
31	50
32	51
33	53
34	54
35	57
36	58
37	59
38	60
39	62
40	63
41	65
42	66
43	67
44	69
45	73
46	76
47	77
48	80
49	81
50	82
51	83
52	84
53	87
54	88
55	90
56	92
57	93
58	94
59	96
60	97
61	98
62	99
63	100
64	102
65	103
66	104
67	109
68	111

[3, 5, 8, 10, 11, 12, 13, 14, 15, 16, 18, 19, 21, 22, 23, 25, 27, 28, 30, 31, 32, 34, 39, 40, 41, 43, 44, 45, 46, 48, 50, 51, 53, 54, 57, 58, 59, 60, 62, 63, 65, 66, 67, 69, 73, 76, 77, 80, 81, 82, 83, 84, 87, 88, 90, 92, 93, 94, 96, 97, 98, 99, 100, 102, 103, 104, 109, 111]

cp's OEIS Frontend

A120943 Numbers n such that merging first n digits in decimal expansion of Pi (A000796) gives a squarefree composite number.

Table of values

List of values

n	a(n)
1	3
2	5
3	8
4	10
5	11
6	12
7	13
8	14
9	15
10	16
11	18
12	19
13	21
14	22
15	23
16	25
17	27
18	28
19	30
20	31
21	32
22	34
23	39
24	40
25	41
26	43
27	44
28	45
29	46
30	48
31	50
32	51
33	53
34	54
35	57
36	58
37	59
38	60
39	62
40	63
41	65
42	66
43	67
44	69
45	73
46	76
47	77
48	80
49	81
50	82
51	83
52	84
53	87
54	88
55	90
56	92
57	93
58	94
59	96
60	97
61	98
62	99
63	100
64	102
65	103
66	104
67	109
68	111

n	a(n)
1	3
2	5
3	8
4	10
5	11
6	12
7	13
8	14
9	15
10	16
11	18
12	19
13	21
14	22
15	23
16	25
17	27
18	28
19	30
20	31
21	32
22	34
23	39
24	40
25	41
26	43
27	44
28	45
29	46
30	48
31	50
32	51
33	53
34	54
35	57
36	58
37	59
38	60
39	62
40	63
41	65
42	66
43	67
44	69
45	73
46	76
47	77
48	80
49	81
50	82
51	83
52	84
53	87
54	88
55	90
56	92
57	93
58	94
59	96
60	97
61	98
62	99
63	100
64	102
65	103
66	104
67	109
68	111

n	a(n)
1	3
2	5
3	8
4	10
5	11
6	12
7	13
8	14
9	15
10	16
11	18
12	19
13	21
14	22
15	23
16	25
17	27
18	28
19	30
20	31
21	32
22	34
23	39
24	40
25	41
26	43
27	44
28	45
29	46
30	48
31	50
32	51
33	53
34	54
35	57
36	58
37	59
38	60
39	62
40	63
41	65
42	66
43	67
44	69
45	73
46	76
47	77
48	80
49	81
50	82
51	83
52	84
53	87
54	88
55	90
56	92
57	93
58	94
59	96
60	97
61	98
62	99
63	100
64	102
65	103
66	104
67	109
68	111