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.

A269031 Number of n X 4 0..2 arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two exactly once.

Table of values

n a(n)
1 36
2 216
3 2166
4 18384
5 146064
6 1114848
7 8277072
8 60218112
9 431354928
10 3052215072
11 21383561232
12 148585984320
13 1025363155440
14 7034327057760
15 48013557090768
16 326276117933952
17 2208609401649072
18 14899002865010592
19 100198549907000208

List of values

[36, 216, 2166, 18384, 146064, 1114848, 8277072, 60218112, 431354928, 3052215072, 21383561232, 148585984320, 1025363155440, 7034327057760, 48013557090768, 326276117933952, 2208609401649072, 14899002865010592, 100198549907000208]

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

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