A123159 - cp's OEIS frontend

A123159 Conjectured smallest Sierpiński numbers of the second kind S, base b=2,3,4,5,..., where S*b^n+1 is composite for all n>=1 and gcd(S+1, b-1) = 1.

n	a(n)
2	78557
3	125050976086
4	66741
5	159986
6	174308
7	1112646039348
8	1
9	2344
10	9175
11	1490
12	521
13	132
14	4
15	91218919470156
16	2500
17	278
18	398
19	765174
20	8
21	1002
22	6694
23	182
24	30651
25	262638
26	221
27	8
28	4554
29	4
30	867
31	6360528
32	1
33	1854
34	6
35	214018
36	1886
37	2604
38	14
39	166134
40	826477
41	8
42	13372
43	2256
44	4
45	53474

[78557, 125050976086, 66741, 159986, 174308, 1112646039348, 1, 2344, 9175, 1490, 521, 132, 4, 91218919470156, 2500, 278, 398, 765174, 8, 1002, 6694, 182, 30651, 262638, 221, 8, 4554, 4, 867, 6360528, 1, 1854, 6, 214018, 1886, 2604, 14, 166134, 826477, 8, 13372, 2256, 4, 53474]

cp's OEIS Frontend

A123159 Conjectured smallest Sierpiński numbers of the second kind S, base b=2,3,4,5,..., where S*b^n+1 is composite for all n>=1 and gcd(S+1, b-1) = 1.

Table of values

List of values