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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.

A201914 Least prime p such that p+1 is divisible by 2^n and not by 2^(n+1).

Table of values

n a(n)
0 2
1 5
2 3
3 7
4 47
5 31
6 191
7 127
8 1279
9 3583
10 5119
11 6143
12 20479
13 8191
14 81919
15 294911
16 1114111
17 131071
18 786431
19 524287
20 17825791
21 14680063
22 138412031
23 109051903
24 654311423
25 1912602623
26 738197503
27 2818572287
28 7247757311
29 3758096383
30 228707008511
31 2147483647

List of values

[2, 5, 3, 7, 47, 31, 191, 127, 1279, 3583, 5119, 6143, 20479, 8191, 81919, 294911, 1114111, 131071, 786431, 524287, 17825791, 14680063, 138412031, 109051903, 654311423, 1912602623, 738197503, 2818572287, 7247757311, 3758096383, 228707008511, 2147483647]

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

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