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.

A330158 Number of nonnegative integer matrices with total sum n, distinct columns with equal sums and any number of nonzero rows in nonincreasing lexicographic order.

Table of values

n a(n)
1 1
2 3
3 4
4 13
5 8
6 83
7 16
8 530
9 630
10 5620
11 57
12 119889
13 102
14 1901749
15 1498322
16 50091143
17 298
18 1649302673
19 491
20 54919254373
21 16723808377
22 2269075359300
23 1256
24 110133775311277
25 26852941986
26 5707320920415984
27 622570195638208
28 339574840900645411
29 4566
30 22572315004012650868

List of values

[1, 3, 4, 13, 8, 83, 16, 530, 630, 5620, 57, 119889, 102, 1901749, 1498322, 50091143, 298, 1649302673, 491, 54919254373, 16723808377, 2269075359300, 1256, 110133775311277, 26852941986, 5707320920415984, 622570195638208, 339574840900645411, 4566, 22572315004012650868]

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

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