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.

A207905 Number of nX5 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 0 and 0 1 1 vertically.

Table of values

n a(n)
1 15
2 225
3 1071
4 4089
5 13865
6 39831
7 110775
8 289467
9 730377
10 1811997
11 4393069
12 10558951
13 25146429
14 59475625
15 140190519
16 329138641
17 771108603
18 1803405621
19 4211351857
20 9825749755
21 22905455175
22 53364801587
23 124272402673
24 289284276825

List of values

[15, 225, 1071, 4089, 13865, 39831, 110775, 289467, 730377, 1811997, 4393069, 10558951, 25146429, 59475625, 140190519, 329138641, 771108603, 1803405621, 4211351857, 9825749755, 22905455175, 53364801587, 124272402673, 289284276825]

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

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