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.

A197276 Number of nX4 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 2,0,1,1,1 for x=0,1,2,3,4.

Table of values

n a(n)
1 5
2 29
3 92
4 627
5 2731
6 11850
7 57137
8 276689
9 1344992
10 6445595
11 30716245
12 146763830
13 705198523
14 3392533967
15 16288546542
16 78114416927
17 374644274789
18 1797996141058
19 8631814710395
20 41433944954559
21 198846557512440
22 954242657026897

List of values

[5, 29, 92, 627, 2731, 11850, 57137, 276689, 1344992, 6445595, 30716245, 146763830, 705198523, 3392533967, 16288546542, 78114416927, 374644274789, 1797996141058, 8631814710395, 41433944954559, 198846557512440, 954242657026897]

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

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