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.

A196451 Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.

Table of values

n a(n)
1 4
2 14
3 40
4 131
5 383
6 1232
7 3966
8 12314
9 38745
10 122989
11 386667
12 1216157
13 3839910
14 12101854
15 38109643
16 120144068
17 378709117
18 1193259020
19 3760674157
20 11852918903
21 37353389828
22 117718989595
23 371005905259
24 1169236902187
25 3684870558556

List of values

[4, 14, 40, 131, 383, 1232, 3966, 12314, 38745, 122989, 386667, 1216157, 3839910, 12101854, 38109643, 120144068, 378709117, 1193259020, 3760674157, 11852918903, 37353389828, 117718989595, 371005905259, 1169236902187, 3684870558556]

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

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