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.

A181237 Number of (3n) X 3 binary matrices with all row sums equal and all column sums equal.

Table of values

n a(n)
1 14
2 182
3 3362
4 69302
5 1513514
6 34306274
7 798145922
8 18931023542
9 455746863002
10 11101993582682
11 273053990926082
12 6769463525042402
13 168956196145732802
14 4241145331821456002
15 106989959570749263362
16 2710690928812030164662

List of values

[14, 182, 3362, 69302, 1513514, 34306274, 798145922, 18931023542, 455746863002, 11101993582682, 273053990926082, 6769463525042402, 168956196145732802, 4241145331821456002, 106989959570749263362, 2710690928812030164662]

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

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