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.

A269071 Number of n X 4 binary arrays with some element plus some horizontally, diagonally or antidiagonally adjacent neighbor totalling two not more than once.

Table of values

n a(n)
1 13
2 76
3 521
4 3288
5 20400
6 123976
7 742688
8 4397376
9 25791040
10 150081504
11 867569920
12 4986765312
13 28523566592
14 162453499008
15 921756644864
16 5212543265792
17 29388948548608
18 165253519908352
19 926962234179584
20 5188178346090496

List of values

[13, 76, 521, 3288, 20400, 123976, 742688, 4397376, 25791040, 150081504, 867569920, 4986765312, 28523566592, 162453499008, 921756644864, 5212543265792, 29388948548608, 165253519908352, 926962234179584, 5188178346090496]

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

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