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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.

A196136 Number of nX6 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 0,2,1,3,4 for x=0,1,2,3,4.

Table of values

n a(n)
1 1
2 19
3 70
4 251
5 1350
6 3716
7 20706
8 63545
9 255501
10 992477
11 3693353
12 15143098
13 54682695
14 222402469
15 838015799
16 3238327921
17 12552211666
18 47967154876
19 187109798637
20 714494895572
21 2773237529931
22 10674786749417
23 41144890359713

List of values

[1, 19, 70, 251, 1350, 3716, 20706, 63545, 255501, 992477, 3693353, 15143098, 54682695, 222402469, 838015799, 3238327921, 12552211666, 47967154876, 187109798637, 714494895572, 2773237529931, 10674786749417, 41144890359713]

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

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