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.

A302666 Number of nX4 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

Table of values

n a(n)
1 2
2 45
3 164
4 934
5 4267
6 21949
7 106793
8 529984
9 2617548
10 12938179
11 63986777
12 316244862
13 1563877465
14 7731246308
15 38227036552
16 188999363652
17 934471931880
18 4620268994057
19 22843909984025
20 112946725741085
21 558440468796391

List of values

[2, 45, 164, 934, 4267, 21949, 106793, 529984, 2617548, 12938179, 63986777, 316244862, 1563877465, 7731246308, 38227036552, 188999363652, 934471931880, 4620268994057, 22843909984025, 112946725741085, 558440468796391]

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

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