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.

A303313 Number of nX7 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 21
2 23
3 158
4 439
5 1799
6 7096
7 26184
8 100128
9 387892
10 1473950
11 5617780
12 21537368
13 82283698
14 314136752
15 1201134460
16 4591062616
17 17541004106
18 67038118694
19 256214474112
20 979116873266
21 3741800363318
22 14300090089956
23 54649561868376

List of values

[21, 23, 158, 439, 1799, 7096, 26184, 100128, 387892, 1473950, 5617780, 21537368, 82283698, 314136752, 1201134460, 4591062616, 17541004106, 67038118694, 256214474112, 979116873266, 3741800363318, 14300090089956, 54649561868376]

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

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