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.

A300806 Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 4
2 29
3 170
4 1004
5 5908
6 34836
7 205369
8 1210811
9 7138574
10 42087052
11 248133414
12 1462925107
13 8624996341
14 50850561207
15 299800657068
16 1767540650375
17 10420924293471
18 61438849007573
19 362226234550315
20 2135584359343994

List of values

[4, 29, 170, 1004, 5908, 34836, 205369, 1210811, 7138574, 42087052, 248133414, 1462925107, 8624996341, 50850561207, 299800657068, 1767540650375, 10420924293471, 61438849007573, 362226234550315, 2135584359343994]

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

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