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A067219
Number of n X n 0..11 matrices with all row and column sums equal.
1
1, 12, 144, 75516, 4641494832, 31335724079805792, 24293081804978470413606900
OFFSET
0,2
CROSSREFS
Column k=11 of A202784.
Sequence in context: A138444 A137886 A097303 * A075619 A055332 A288792
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Feb 20 2002
EXTENSIONS
a(5)-a(6) from Sean A. Irvine, Dec 11 2023
a(0)=1 prepended by Andrew Howroyd, Oct 14 2024
STATUS
approved