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.

A228504 Number of n X 6 binary arrays with top left value 1 and no two ones adjacent horizontally, vertically, diagonally or antidiagonally.

Table of values

n a(n)
1 8
2 21
3 239
4 1252
5 9528
6 59839
7 413786
8 2724191
9 18387032
10 122539084
11 821945828
12 5495164996
13 36800032261
14 246231184011
15 1648269251345
16 11031030456148
17 73833534042745
18 494158034052549
19 3307432804186754
20 22136531409536410

List of values

[8, 21, 239, 1252, 9528, 59839, 413786, 2724191, 18387032, 122539084, 821945828, 5495164996, 36800032261, 246231184011, 1648269251345, 11031030456148, 73833534042745, 494158034052549, 3307432804186754, 22136531409536410]

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

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