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.

A331196 Number of nonnegative integer matrices with n distinct columns and any number of nonzero rows with each column sum being 3 and rows in nonincreasing lexicographic order.

Table of values

n a(n)
0 1
1 3
2 28
3 599
4 23243
5 1440532
6 131530132
7 16720208200
8 2837752812927
9 622570020892599
10 172077041175850521
11 58679982298020226625
12 24262822372018694983540
13 11986886218243164848742812
14 6987708088810202717378639087
15 4754544525981425409034078100189

List of values

[1, 3, 28, 599, 23243, 1440532, 131530132, 16720208200, 2837752812927, 622570020892599, 172077041175850521, 58679982298020226625, 24262822372018694983540, 11986886218243164848742812, 6987708088810202717378639087, 4754544525981425409034078100189]

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

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