cp's OEIS Frontend

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.

A212408 Number of binary arrays of length 2*n+6 with no more than n ones in any length 2n subsequence (=50% duty cycle).

Table of values

n a(n)
1 55
2 285
3 1314
4 5769
5 24322
6 100736
7 413220
8 1685039
9 6844362
10 27724036
11 112072540
12 452348578
13 1823583124
14 7344493104
15 29556979016
16 118871913787
17 477820811258
18 1919788147772
19 7710323488748
20 30956089143902
21 124248950086268

List of values

[55, 285, 1314, 5769, 24322, 100736, 413220, 1685039, 6844362, 27724036, 112072540, 452348578, 1823583124, 7344493104, 29556979016, 118871913787, 477820811258, 1919788147772, 7710323488748, 30956089143902, 124248950086268]

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

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