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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.

A197408 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,1,1,1 for x=0,1,2,3,4.

Table of values

n a(n)
1 25
2 2107
3 34717
4 1634731
5 60334353
6 2065093081
7 77683473682
8 2861267797023
9 104224692369107
10 3821001855576417
11 140295906943370100
12 5143358134125047217
13 188539285472381998575
14 6914680866283564114758
15 253564501233044701809946

List of values

[25, 2107, 34717, 1634731, 60334353, 2065093081, 77683473682, 2861267797023, 104224692369107, 3821001855576417, 140295906943370100, 5143358134125047217, 188539285472381998575, 6914680866283564114758, 253564501233044701809946]

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

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