A181408 - cp's OEIS frontend

A181408 Numbers n such that there is at least one pair of twin primes 2^n - 2^k - 1 and 2^n - 2^k + 1 with n/2 <= k < n.

n	a(n)
1	3
2	4
3	8
4	14
5	20
6	30
7	49
8	66
9	94
10	108
11	124
12	137
13	145
14	193
15	204
16	252
17	280
18	288
19	326
20	384
21	390
22	403
23	437
24	466
25	528
26	584
27	665
28	881
29	1260
30	1538
31	1997
32	2418
33	2460
34	2690
35	3684
36	4006
37	5035
38	5274
39	7748
40	8628

[3, 4, 8, 14, 20, 30, 49, 66, 94, 108, 124, 137, 145, 193, 204, 252, 280, 288, 326, 384, 390, 403, 437, 466, 528, 584, 665, 881, 1260, 1538, 1997, 2418, 2460, 2690, 3684, 4006, 5035, 5274, 7748, 8628]

cp's OEIS Frontend

A181408 Numbers n such that there is at least one pair of twin primes 2^n - 2^k - 1 and 2^n - 2^k + 1 with n/2 <= k < n.

Table of values

List of values