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.

A318544 Number of nX7 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 21
2 26
3 107
4 516
5 2349
6 10496
7 46165
8 208159
9 942764
10 4213744
11 18870716
12 84794983
13 380556843
14 1707239770
15 7660779072
16 34376713801
17 154258564357
18 692193258418
19 3106040446532
20 13937625995076
21 62541652378393
22 280640300310752

List of values

[21, 26, 107, 516, 2349, 10496, 46165, 208159, 942764, 4213744, 18870716, 84794983, 380556843, 1707239770, 7660779072, 34376713801, 154258564357, 692193258418, 3106040446532, 13937625995076, 62541652378393, 280640300310752]

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

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