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.

A197246 Number of nX4 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 16
3 53
4 275
5 780
6 5713
7 16773
8 98870
9 393913
10 1869033
11 8527840
12 32730687
13 177791439
14 674100600
15 3386483171
16 13856198755
17 66236228308
18 289604893615
19 1242844626331
20 5912414575588
21 24990706118619
22 116867053171491

List of values

[1, 16, 53, 275, 780, 5713, 16773, 98870, 393913, 1869033, 8527840, 32730687, 177791439, 674100600, 3386483171, 13856198755, 66236228308, 289604893615, 1242844626331, 5912414575588, 24990706118619, 116867053171491]

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

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