A273786 - cp's OEIS frontend

A273786 Numbers n where a prime p < n exists such that n^(p-1) == 1 (mod p^2), i.e., such that p is a base-n Wieferich prime.

n	a(n)
1	5
2	7
3	8
4	9
5	10
6	13
7	17
8	18
9	19
10	21
11	22
12	23
13	24
14	25
15	26
16	27
17	28
18	29
19	30
20	31
21	32
22	33
23	35
24	37
25	38
26	40
27	41
28	42
29	43
30	44
31	45
32	46
33	48
34	49
35	50
36	51
37	53
38	54
39	55
40	57
41	60
42	61
43	62
44	63
45	64
46	65
47	67
48	68
49	69
50	70
51	71
52	73
53	74
54	75
55	76
56	77
57	78
58	79
59	80
60	81
61	82
62	85
63	89
64	91
65	93
66	94

[5, 7, 8, 9, 10, 13, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 37, 38, 40, 41, 42, 43, 44, 45, 46, 48, 49, 50, 51, 53, 54, 55, 57, 60, 61, 62, 63, 64, 65, 67, 68, 69, 70, 71, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 85, 89, 91, 93, 94]

cp's OEIS Frontend

A273786 Numbers n where a prime p < n exists such that n^(p-1) == 1 (mod p^2), i.e., such that p is a base-n Wieferich prime.

Table of values

List of values

n	a(n)
1	5
2	7
3	8
4	9
5	10
6	13
7	17
8	18
9	19
10	21
11	22
12	23
13	24
14	25
15	26
16	27
17	28
18	29
19	30
20	31
21	32
22	33
23	35
24	37
25	38
26	40
27	41
28	42
29	43
30	44
31	45
32	46
33	48
34	49
35	50
36	51
37	53
38	54
39	55
40	57
41	60
42	61
43	62
44	63
45	64
46	65
47	67
48	68
49	69
50	70
51	71
52	73
53	74
54	75
55	76
56	77
57	78
58	79
59	80
60	81
61	82
62	85
63	89
64	91
65	93
66	94

n	a(n)
1	5
2	7
3	8
4	9
5	10
6	13
7	17
8	18
9	19
10	21
11	22
12	23
13	24
14	25
15	26
16	27
17	28
18	29
19	30
20	31
21	32
22	33
23	35
24	37
25	38
26	40
27	41
28	42
29	43
30	44
31	45
32	46
33	48
34	49
35	50
36	51
37	53
38	54
39	55
40	57
41	60
42	61
43	62
44	63
45	64
46	65
47	67
48	68
49	69
50	70
51	71
52	73
53	74
54	75
55	76
56	77
57	78
58	79
59	80
60	81
61	82
62	85
63	89
64	91
65	93
66	94

n	a(n)
1	5
2	7
3	8
4	9
5	10
6	13
7	17
8	18
9	19
10	21
11	22
12	23
13	24
14	25
15	26
16	27
17	28
18	29
19	30
20	31
21	32
22	33
23	35
24	37
25	38
26	40
27	41
28	42
29	43
30	44
31	45
32	46
33	48
34	49
35	50
36	51
37	53
38	54
39	55
40	57
41	60
42	61
43	62
44	63
45	64
46	65
47	67
48	68
49	69
50	70
51	71
52	73
53	74
54	75
55	76
56	77
57	78
58	79
59	80
60	81
61	82
62	85
63	89
64	91
65	93
66	94