A058194 Number of n-rowed matrices with entries {0,1,2,3} and all row sums 3, up to row and column permutation.

1, 3, 21, 162, 1636, 19977, 298416, 5300296, 110219750, 2639842989, 71859429837, 2198244062193, 74860247277672, 2815351714711122, 116130005180284423, 5222901881792429337, 254791333526874348652, 13420798291405599027605, 760201936044714899316798, 46137860613934391781325337, 2990483661567310913388458734

Offset: 0

Author

Vladeta Jovovic, Nov 27 2000

Keywords

• nonn

Crossrefs

Row n=3 of A331485.

Cf. A007717, A058407, A058409, A050913.

Programs

PARI

\\ See A318951 for RowSumMats
a(n)=RowSumMats(n, 3*n, 3); \\ Andrew Howroyd, Sep 06 2018

Extensions

a(11)-a(20) from Andrew Howroyd, Sep 06 2018