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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.

A266462 The number of conjugacy classes of invertible n X n matrices over GF(2) which are squares of other such matrices.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 10
5 20
6 41
7 82
8 166
9 334
10 667
11 1336
12 2682
13 5360
14 10724
15 21467
16 42936
17 85876
18 171786
19 343574
20 687184
21 1374427
22 2748852
23 5497766
24 10995706
25 21991402
26 43982908
27 87966150
28 175932383
29 351864964
30 703730584
31 1407461288
32 2814923196
33 5629847656
34 11259695532

List of values

[1, 1, 2, 5, 10, 20, 41, 82, 166, 334, 667, 1336, 2682, 5360, 10724, 21467, 42936, 85876, 171786, 343574, 687184, 1374427, 2748852, 5497766, 10995706, 21991402, 43982908, 87966150, 175932383, 351864964, 703730584, 1407461288, 2814923196, 5629847656, 11259695532]

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

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