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A067216
Number of n X n 0..8 matrices with all row and column sums equal.
1
1, 9, 81, 18081, 264639729, 239657412990669, 14022194613733384575957, 55099298574634623527360069025765
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OFFSET
0,2
LINKS
Table of n, a(n) for n=0..7.
CROSSREFS
Column k=8 of A202784.
Sequence in context: A168493 A003302 A053915 * A076088 A061211 A115988
Adjacent sequences: A067213 A067214 A067215 * A067217 A067218 A067219
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

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Last modified November 15 02:41 EST 2024. Contains 377736 sequences.
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