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.

A269091 Number of n X 2 0..3 arrays with some element plus some horizontally or vertically adjacent neighbor totalling three exactly once.

Table of values

n a(n)
1 4
2 96
3 1152
4 11424
5 103488
6 889056
7 7375872
8 59698464
9 474360768
10 3715826016
11 28777886592
12 220814937504
13 1681292682048
14 12718165610976
15 95670977133312
16 716203564928544
17 5338972029467328
18 39651633731043936
19 293513242790716032

List of values

[4, 96, 1152, 11424, 103488, 889056, 7375872, 59698464, 474360768, 3715826016, 28777886592, 220814937504, 1681292682048, 12718165610976, 95670977133312, 716203564928544, 5338972029467328, 39651633731043936, 293513242790716032]

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

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