A309572 - cp's OEIS frontend

A309572 Number of primes of which all substrings in base n are primes.

n	a(n)
2	0
3	1
4	3
5	5
6	5
7	7
8	19
9	7
10	9
11	6
12	25
13	11
14	22
15	16
16	18
17	12
18	54
19	12
20	48
21	18
22	33
23	13
24	103
25	16
26	27
27	20
28	50
29	13
30	161
31	14
32	66
33	27
34	47
35	19
36	109
37	18
38	67
39	22
40	70
41	15
42	226
43	22
44	82
45	33
46	67
47	24
48	261
49	26
50	137
51	29
52	89
53	23
54	273
55	29
56	102
57	31
58	82
59	24
60	546
61	26
62	119
63	37
64	110
65	29

[0, 1, 3, 5, 5, 7, 19, 7, 9, 6, 25, 11, 22, 16, 18, 12, 54, 12, 48, 18, 33, 13, 103, 16, 27, 20, 50, 13, 161, 14, 66, 27, 47, 19, 109, 18, 67, 22, 70, 15, 226, 22, 82, 33, 67, 24, 261, 26, 137, 29, 89, 23, 273, 29, 102, 31, 82, 24, 546, 26, 119, 37, 110, 29]

cp's OEIS Frontend

A309572 Number of primes of which all substrings in base n are primes.

Table of values

List of values

n	a(n)
2	0
3	1
4	3
5	5
6	5
7	7
8	19
9	7
10	9
11	6
12	25
13	11
14	22
15	16
16	18
17	12
18	54
19	12
20	48
21	18
22	33
23	13
24	103
25	16
26	27
27	20
28	50
29	13
30	161
31	14
32	66
33	27
34	47
35	19
36	109
37	18
38	67
39	22
40	70
41	15
42	226
43	22
44	82
45	33
46	67
47	24
48	261
49	26
50	137
51	29
52	89
53	23
54	273
55	29
56	102
57	31
58	82
59	24
60	546
61	26
62	119
63	37
64	110
65	29

n	a(n)
2	0
3	1
4	3
5	5
6	5
7	7
8	19
9	7
10	9
11	6
12	25
13	11
14	22
15	16
16	18
17	12
18	54
19	12
20	48
21	18
22	33
23	13
24	103
25	16
26	27
27	20
28	50
29	13
30	161
31	14
32	66
33	27
34	47
35	19
36	109
37	18
38	67
39	22
40	70
41	15
42	226
43	22
44	82
45	33
46	67
47	24
48	261
49	26
50	137
51	29
52	89
53	23
54	273
55	29
56	102
57	31
58	82
59	24
60	546
61	26
62	119
63	37
64	110
65	29

n	a(n)
2	0
3	1
4	3
5	5
6	5
7	7
8	19
9	7
10	9
11	6
12	25
13	11
14	22
15	16
16	18
17	12
18	54
19	12
20	48
21	18
22	33
23	13
24	103
25	16
26	27
27	20
28	50
29	13
30	161
31	14
32	66
33	27
34	47
35	19
36	109
37	18
38	67
39	22
40	70
41	15
42	226
43	22
44	82
45	33
46	67
47	24
48	261
49	26
50	137
51	29
52	89
53	23
54	273
55	29
56	102
57	31
58	82
59	24
60	546
61	26
62	119
63	37
64	110
65	29