A063983 - cp's OEIS frontend

A063983 Least k such that k*2^n +/- 1 are twin primes.

n	a(n)
0	4
1	2
2	1
3	9
4	12
5	6
6	3
7	9
8	57
9	30
10	15
11	99
12	165
13	90
14	45
15	24
16	12
17	6
18	3
19	69
20	132
21	66
22	33
23	486
24	243
25	324
26	162
27	81
28	90
29	45
30	345
31	681
32	585
33	375
34	267
35	426
36	213
37	429
38	288
39	144
40	72
41	36
42	18
43	9
44	147
45	810
46	405
47	354
48	177
49	1854
50	927
51	1125
52	1197
53	666
54	333
55	519
56	1032
57	516
58	258
59	129
60	72

[4, 2, 1, 9, 12, 6, 3, 9, 57, 30, 15, 99, 165, 90, 45, 24, 12, 6, 3, 69, 132, 66, 33, 486, 243, 324, 162, 81, 90, 45, 345, 681, 585, 375, 267, 426, 213, 429, 288, 144, 72, 36, 18, 9, 147, 810, 405, 354, 177, 1854, 927, 1125, 1197, 666, 333, 519, 1032, 516, 258, 129, 72]

cp's OEIS Frontend

A063983 Least k such that k*2^n +/- 1 are twin primes.

Table of values

List of values