A194608 - cp's OEIS frontend

A194608 Smallest prime either of the form prime(n)2^k - 1 or prime(n)2^k + 1, k >= 0, or 0 if no such prime exists, where prime(n) denotes the n-th prime number.

n	a(n)
1	3
2	2
3	11
4	13
5	23
6	53
7	67
8	37
9	47
10	59
11	61
12	73
13	83
14	173
15	751
16	107
17	1889
18	487
19	269
20	283
21	293
22	157
23	167
24	179
25	193
26	809
27	823
28	857
29	6977
30	227
31	509
32	263
33	547
34	277
35	1193
36	2417
37	313
38	653
39	2671
40	347
41	359
42	1447
43	383
44	773
45	787
46	397
47	421
48	1783
49	907
50	457
51	467
52	479
53	493567

[3, 2, 11, 13, 23, 53, 67, 37, 47, 59, 61, 73, 83, 173, 751, 107, 1889, 487, 269, 283, 293, 157, 167, 179, 193, 809, 823, 857, 6977, 227, 509, 263, 547, 277, 1193, 2417, 313, 653, 2671, 347, 359, 1447, 383, 773, 787, 397, 421, 1783, 907, 457, 467, 479, 493567]

cp's OEIS Frontend

A194608 Smallest prime either of the form prime(n)2^k - 1 or prime(n)2^k + 1, k >= 0, or 0 if no such prime exists, where prime(n) denotes the n-th prime number.

Table of values

List of values

cp's OEIS Frontend

A194608 Smallest prime either of the form prime(n)*2^k - 1 or prime(n)*2^k + 1, k >= 0, or 0 if no such prime exists, where prime(n) denotes the n-th prime number.

Table of values

List of values

A194608 Smallest prime either of the form prime(n)2^k - 1 or prime(n)2^k + 1, k >= 0, or 0 if no such prime exists, where prime(n) denotes the n-th prime number.