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.

A300772 Number of nX4 0..1 arrays with every element equal to 2, 3, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 0
2 4
3 11
4 36
5 179
6 735
7 3482
8 15986
9 74347
10 346927
11 1617399
12 7555603
13 35285141
14 164831052
15 770046798
16 3597506545
17 16807267889
18 78522710349
19 366856173460
20 1713946215073
21 8007540142806
22 37411176619541
23 174784828107456

List of values

[0, 4, 11, 36, 179, 735, 3482, 15986, 74347, 346927, 1617399, 7555603, 35285141, 164831052, 770046798, 3597506545, 16807267889, 78522710349, 366856173460, 1713946215073, 8007540142806, 37411176619541, 174784828107456]

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

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