A348347 - cp's OEIS frontend

A348347 Smallest k such that in the pairs of numbers j*k +- 1, none is prime for 1 <= j < n but at least one is prime for j = n; or 0 if no such k exists.

n	a(n)
1	1
2	5
3	92
4	13
5	208
6	47
7	512
8	149
9	1688
10	145
11	6686
12	539
13	4106
14	757
15	9970
16	1217
17	16012
18	881
19	56194
20	2441
21	53576
22	3343
23	111992
24	2917
25	152734
26	2053
27	49376
28	6791
29	839522
30	4985
31	114118
32	30097
33	567302
34	17209
35	493618
36	33613
37	991976
38	28097
39	758932
40	91099
41	1898368
42	36271

[1, 5, 92, 13, 208, 47, 512, 149, 1688, 145, 6686, 539, 4106, 757, 9970, 1217, 16012, 881, 56194, 2441, 53576, 3343, 111992, 2917, 152734, 2053, 49376, 6791, 839522, 4985, 114118, 30097, 567302, 17209, 493618, 33613, 991976, 28097, 758932, 91099, 1898368, 36271]

cp's OEIS Frontend

A348347 Smallest k such that in the pairs of numbers j*k +- 1, none is prime for 1 <= j < n but at least one is prime for j = n; or 0 if no such k exists.

Table of values

List of values