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.

A318074 Number of nX7 0..1 arrays with every element unequal to 0, 1, 2 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 64
2 190
3 404
4 861
5 2195
6 9966
7 46884
8 184156
9 819263
10 3703730
11 15865269
12 69944965
13 310937380
14 1361781447
15 5998215467
16 26503896368
17 116659469704
18 513984726015
19 2266966511804
20 9989194862172
21 44021107304800
22 194059543279029

List of values

[64, 190, 404, 861, 2195, 9966, 46884, 184156, 819263, 3703730, 15865269, 69944965, 310937380, 1361781447, 5998215467, 26503896368, 116659469704, 513984726015, 2266966511804, 9989194862172, 44021107304800, 194059543279029]

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

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