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.

A196295 Number of nX3 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 4
2 20
3 58
4 290
5 1201
6 4988
7 21344
8 90150
9 381754
10 1621695
11 6890299
12 29235310
13 124148208
14 527208582
15 2238746157
16 9507860508
17 40379986769
18 171493157818
19 728338492990
20 3093321027043
21 13137679999737
22 55797480705949

List of values

[4, 20, 58, 290, 1201, 4988, 21344, 90150, 381754, 1621695, 6890299, 29235310, 124148208, 527208582, 2238746157, 9507860508, 40379986769, 171493157818, 728338492990, 3093321027043, 13137679999737, 55797480705949]

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

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