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A067216 Number of n X n 0..8 matrices with all row and column sums equal. 1
9, 81, 18081, 264639729, 239657412990669, 14022194613733384575957, 55099298574634623527360069025765 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..7.
CROSSREFS
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
STATUS
approved

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Last modified May 17 01:28 EDT 2024. Contains 372555 sequences. (Running on oeis4.)