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.

A268794 Number of nX4 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 36
2 234
3 950
4 4800
5 23994
6 117062
7 561116
8 2652936
9 12405748
10 57490444
11 264428454
12 1208522850
13 5493284922
14 24851601802
15 111963916212
16 502590509990
17 2248738675490
18 10032298715910
19 44640056867750
20 198161794087570

List of values

[36, 234, 950, 4800, 23994, 117062, 561116, 2652936, 12405748, 57490444, 264428454, 1208522850, 5493284922, 24851601802, 111963916212, 502590509990, 2248738675490, 10032298715910, 44640056867750, 198161794087570]

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

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