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A067223
Number of n X n 0..15 matrices with all row and column sums equal.
1
1, 16, 256, 316624, 81851507456, 4128449284755670956, 42503886964244001261643010752
OFFSET
0,2
CROSSREFS
Column k=15 of A202784.
Sequence in context: A204080 A223433 A223593 * A041113 A363689 A041482
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Feb 20 2002
EXTENSIONS
a(5)-a(6) from Sean A. Irvine, Dec 10 2023
a(0)=1 prepended by Andrew Howroyd, Oct 14 2024
STATUS
approved