A286816 - cp's OEIS frontend

A286816 Smallest b such that the k consecutive primes starting with prime(n) are all base-b Wieferich primes, i.e., satisfy b^(p-1) == 1 (mod p^2). Square array A(n, k), read by antidiagonals downwards.

n	a(n)
1	5
2	17
3	8
4	449
5	26
6	7
7	557
8	226
9	18
10	18
11	19601
12	1207
13	1207
14	148
15	3
16	132857
17	54568
18	1451
19	606
20	239
21	19
22	4486949
23	2006776
24	13543
25	13543
26	3469
27	249
28	38
29	126664001
30	20950343
31	296449
32	296449
33	24675
34	653
35	423
36	28
37	2363321449
38	230695118
39	23250274
40	17134811
41	3414284
42	39016
43	5649
44	28
45	28
46	5229752849
47	5229752849
48	882345432
49	741652533
50	36763941
51	14380864
52	217682
53	26645
54	63
55	14

[5, 17, 8, 449, 26, 7, 557, 226, 18, 18, 19601, 1207, 1207, 148, 3, 132857, 54568, 1451, 606, 239, 19, 4486949, 2006776, 13543, 13543, 3469, 249, 38, 126664001, 20950343, 296449, 296449, 24675, 653, 423, 28, 2363321449, 230695118, 23250274, 17134811, 3414284, 39016, 5649, 28, 28, 5229752849, 5229752849, 882345432, 741652533, 36763941, 14380864, 217682, 26645, 63, 14]

cp's OEIS Frontend

A286816 Smallest b such that the k consecutive primes starting with prime(n) are all base-b Wieferich primes, i.e., satisfy b^(p-1) == 1 (mod p^2). Square array A(n, k), read by antidiagonals downwards.

Table of values

List of values