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This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A335874 Primes of the form q*2^h - 1, where q is a Mersenne prime (A000668).

Table of values

n a(n)
1 2
2 5
3 11
4 13
5 23
6 47
7 61
8 191
9 223
10 383
11 991
12 3583
13 3967
14 6143
15 16381
16 63487
17 253951
18 262111
19 786431
20 917503
21 1048447
22 1048573
23 4194271
24 14680063
25 16777183
26 67108351
27 260046847
28 3758096383
29 4261412863
30 51539607551
31 68718952447
32 266287972351
33 824633720831
34 1065151889407
35 1099503239167

List of values

[2, 5, 11, 13, 23, 47, 61, 191, 223, 383, 991, 3583, 3967, 6143, 16381, 63487, 253951, 262111, 786431, 917503, 1048447, 1048573, 4194271, 14680063, 16777183, 67108351, 260046847, 3758096383, 4261412863, 51539607551, 68718952447, 266287972351, 824633720831, 1065151889407, 1099503239167]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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