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.

A331645 Number of nonnegative integer matrices with n columns and any number of distinct nonzero rows with column sums 3.

Table of values

n a(n)
0 1
1 3
2 87
3 11655
4 4498191
5 3611504823
6 5192498314767
7 12172382140406295
8 43436006002867938351
9 224018914608150321575223
10 1603777845822934662938327247
11 15430102163147097295950086754135
12 194280602846166109497542618768659311
13 3131120528310366432743101620841328437623

List of values

[1, 3, 87, 11655, 4498191, 3611504823, 5192498314767, 12172382140406295, 43436006002867938351, 224018914608150321575223, 1603777845822934662938327247, 15430102163147097295950086754135, 194280602846166109497542618768659311, 3131120528310366432743101620841328437623]

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

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