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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.

A007802 Numbers n such that game of n X n Button Madness need have no solution; this lists only the primitive elements of the set.

Table of values

n a(n)
1 3
2 5
3 17
4 31
5 127
6 257
7 511
8 683
9 2047
10 2731
11 3277
12 3641
13 8191
14 43691
15 52429
16 61681
17 65537
18 85489
19 131071
20 174763
21 178481
22 233017
23 253241
24 256999
25 486737
26 524287
27 704093
28 838861
29 1016801
30 1082401
31 1657009
32 1838599
33 1965379
34 2304167
35 2796203
36 3033169
37 3303821

List of values

[3, 5, 17, 31, 127, 257, 511, 683, 2047, 2731, 3277, 3641, 8191, 43691, 52429, 61681, 65537, 85489, 131071, 174763, 178481, 233017, 253241, 256999, 486737, 524287, 704093, 838861, 1016801, 1082401, 1657009, 1838599, 1965379, 2304167, 2796203, 3033169, 3303821]

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

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