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.

A333734 Number of non-isomorphic n X n nonnegative integer matrices with all row and column sums equal to n up to permutations of rows and columns.

Table of values

n a(n)
0 1
1 1
2 2
3 5
4 43
5 1856
6 1217727
7 8597641912
8 646296747486387
9 535435113671568180963
10 5081029530811947425598907884
11 570680215340337514993573217774604779
12 779646755088025699677478853259568262608053838

List of values

[1, 1, 2, 5, 43, 1856, 1217727, 8597641912, 646296747486387, 535435113671568180963, 5081029530811947425598907884, 570680215340337514993573217774604779, 779646755088025699677478853259568262608053838]

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

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