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A058194
Number of n-rowed matrices with entries {0,1,2,3} and all row sums 3, up to row and column permutation.
1
1, 3, 21, 162, 1636, 19977, 298416, 5300296, 110219750, 2639842989, 71859429837, 2198244062193, 74860247277672, 2815351714711122, 116130005180284423, 5222901881792429337, 254791333526874348652, 13420798291405599027605, 760201936044714899316798, 46137860613934391781325337, 2990483661567310913388458734
OFFSET
0,2
PROG
(PARI) \\ See A318951 for RowSumMats
a(n)=RowSumMats(n, 3*n, 3); \\ Andrew Howroyd, Sep 06 2018
CROSSREFS
Row n=3 of A331485.
Sequence in context: A225439 A180400 A166696 * A179815 A118353 A365132
KEYWORD
nonn
AUTHOR
Vladeta Jovovic, Nov 27 2000
EXTENSIONS
a(11)-a(20) from Andrew Howroyd, Sep 06 2018
STATUS
approved