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.

A207907 Number of nX7 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 40
2 1600
3 13230
4 80511
5 417425
6 1726758
7 6835345
8 24832818
9 86006178
10 290773660
11 952221873
12 3079379225
13 9827714792
14 31055966425
15 97631157960
16 305161540736
17 950767241358
18 2954422566171
19 9160209168881
20 28362651790230
21 87706947406905

List of values

[40, 1600, 13230, 80511, 417425, 1726758, 6835345, 24832818, 86006178, 290773660, 952221873, 3079379225, 9827714792, 31055966425, 97631157960, 305161540736, 950767241358, 2954422566171, 9160209168881, 28362651790230, 87706947406905]

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

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