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

0,2

Links

Table of n, a(n) for n=0..20.

Prog

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

Crossrefs

Row n=3 of A331485.

Cf. A007717, A058407, A058409, A050913.

Sequence in context: A225439 A180400 A166696 * A179815 A118353 A365132

Adjacent sequences: A058191 A058192 A058193 * A058195 A058196 A058197

Keyword

nonn

Author

Vladeta Jovovic, Nov 27 2000

Extensions

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

Status

approved