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.

A318342 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 64
2 190
3 344
4 817
5 3321
6 16267
7 86487
8 476348
9 2647555
10 14797928
11 82863837
12 464502820
13 2605038853
14 14613251568
15 81984567828
16 459986291171
17 2580903334169
18 14481247495703
19 81253869292071
20 455915278972371
21 2558145839414926

List of values

[64, 190, 344, 817, 3321, 16267, 86487, 476348, 2647555, 14797928, 82863837, 464502820, 2605038853, 14613251568, 81984567828, 459986291171, 2580903334169, 14481247495703, 81253869292071, 455915278972371, 2558145839414926]

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

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