A058392 Number of 6 X 6 matrices with nonnegative integer entries and all row sums equal to n, up to row and column permutation.

1, 11, 782, 96073, 9283247, 537001197, 19578605324, 487615778173, 8892272235593, 125319645293555, 1423054983691408, 13451239365449764, 108603794657349271, 764673059329865921, 4775254548845993462, 26820549989969591853, 137072193873357150230, 643738505766475169048

Offset: 0

Author

Vladeta Jovovic, Nov 24 2000

Keywords

• nonn

Links

• Andrew Howroyd, Table of n, a(n) for n = 0..1000
• V. Jovovic, Number of m x m nonnegative integer matrices with all row sums equal to n, up to row and column permutation.

Crossrefs

Row 6 of A318951.

Cf. A002620, A058389-A058391, A003439, A005467.

Programs

PARI

\\ See A318951 for RowSumMats
a(n)=RowSumMats(6, 6, n); \\ Andrew Howroyd, Sep 05 2018

Extensions

Terms a(15) and beyond from Andrew Howroyd, Sep 05 2018