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A067223 Number of n X n 0..15 matrices with all row and column sums equal. 1
16, 256, 316624, 81851507456, 4128449284755670956, 42503886964244001261643010752 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
Table of n, a(n) for n=1..6.
CROSSREFS
Sequence in context: A204080 A223433 A223593 * A041113 A363689 A041482
Adjacent sequences: A067220 A067221 A067222 * A067224 A067225 A067226
KEYWORD
nonn,more
AUTHOR
R. H. Hardin, Feb 20 2002
EXTENSIONS
a(5)-a(6) from Sean A. Irvine, Dec 10 2023
STATUS
approved

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Last modified June 8 09:36 EDT 2024. Contains 373217 sequences. (Running on oeis4.)