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.

A266126 Number of n X 3 integer arrays with each element equal to the number of horizontal, diagonal and antidiagonal neighbors exactly one smaller than itself.

Table of values

n a(n)
1 4
2 25
3 77
4 385
5 2099
6 9083
7 48188
8 249446
9 1166325
10 6288299
11 31791039
12 153857132
13 834409385
14 4178055126
15 20594948568
16 111887135749
17 558869714981
18 2784252991713
19 15113219048778
20 75548474928693
21 378923024757908

List of values

[4, 25, 77, 385, 2099, 9083, 48188, 249446, 1166325, 6288299, 31791039, 153857132, 834409385, 4178055126, 20594948568, 111887135749, 558869714981, 2784252991713, 15113219048778, 75548474928693, 378923024757908]

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

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