A337818 - cp's OEIS frontend

A337818 Odd integers k>=3 such that k*(k-1)/2 divides 2^((k-1)/2)+1.

n	a(n)
1	3
2	19
3	163
4	1459
5	370387
6	6381667
7	30001267
8	40417219
9	42384547
10	42633379
11	86093443
12	190008019
13	268435459
14	634471219
15	1630068787
16	2415919123
17	3103616899
18	4677743683
19	7734924739
20	7920392707
21	8114552947
22	10323768979
23	13086951139
24	13984274323
25	18839387107
26	19764019603
27	36164859427

[3, 19, 163, 1459, 370387, 6381667, 30001267, 40417219, 42384547, 42633379, 86093443, 190008019, 268435459, 634471219, 1630068787, 2415919123, 3103616899, 4677743683, 7734924739, 7920392707, 8114552947, 10323768979, 13086951139, 13984274323, 18839387107, 19764019603, 36164859427]

cp's OEIS Frontend

A337818 Odd integers k>=3 such that k*(k-1)/2 divides 2^((k-1)/2)+1.

Table of values

List of values