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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.

A058194 Number of n-rowed matrices with entries {0,1,2,3} and all row sums 3, up to row and column permutation.

Table of values

n a(n)
0 1
1 3
2 21
3 162
4 1636
5 19977
6 298416
7 5300296
8 110219750
9 2639842989
10 71859429837
11 2198244062193
12 74860247277672
13 2815351714711122
14 116130005180284423
15 5222901881792429337
16 254791333526874348652
17 13420798291405599027605
18 760201936044714899316798
19 46137860613934391781325337
20 2990483661567310913388458734

List of values

[1, 3, 21, 162, 1636, 19977, 298416, 5300296, 110219750, 2639842989, 71859429837, 2198244062193, 74860247277672, 2815351714711122, 116130005180284423, 5222901881792429337, 254791333526874348652, 13420798291405599027605, 760201936044714899316798, 46137860613934391781325337, 2990483661567310913388458734]

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

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