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.

A197245 Number of nX3 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,0,1,1,1 for x=0,1,2,3,4.

Table of values

n a(n)
1 1
2 8
3 3
4 53
5 110
6 227
7 1035
8 2004
9 7529
10 20633
11 53902
12 172997
13 474139
14 1395792
15 4009631
16 11336881
17 33563326
18 95906965
19 275694011
20 796470870
21 2294495057
22 6647188965
23 19110664400
24 55033208033
25 159018294491
26 458707454692

List of values

[1, 8, 3, 53, 110, 227, 1035, 2004, 7529, 20633, 53902, 172997, 474139, 1395792, 4009631, 11336881, 33563326, 95906965, 275694011, 796470870, 2294495057, 6647188965, 19110664400, 55033208033, 159018294491, 458707454692]

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

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