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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.

A196296 Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,4,2 for x=0,1,2,3,4.

Table of values

n a(n)
1 5
2 61
3 290
4 2161
5 14231
6 97892
7 686759
8 4731033
9 32374680
10 222897413
11 1539916243
12 10636418118
13 73345982967
14 505430824497
15 3485517910342
16 24049220604349
17 165913015451421
18 1144300512605372
19 7891941802463913
20 54435005065152899

List of values

[5, 61, 290, 2161, 14231, 97892, 686759, 4731033, 32374680, 222897413, 1539916243, 10636418118, 73345982967, 505430824497, 3485517910342, 24049220604349, 165913015451421, 1144300512605372, 7891941802463913, 54435005065152899]

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

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