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A067217
Number of n X n 0..9 matrices with all row and column sums equal.
1
1, 10, 100, 30502, 754898668, 1426274971770170, 214919363287707751206910, 2685049440186600182381381075290270
OFFSET
0,2
CROSSREFS
Column k=9 of A202784.
Sequence in context: A135651 A220812 A139103 * A266175 A304237 A304238
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Feb 20 2002
EXTENSIONS
a(5)-a(7) from Sean A. Irvine, Dec 12 2023
a(0)=1 prepended by Andrew Howroyd, Oct 14 2024
STATUS
approved