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A067219
Number of n X n 0..11 matrices with all row and column sums equal.
1
12, 144, 75516, 4641494832, 31335724079805792, 24293081804978470413606900
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..6.
CROSSREFS
Sequence in context:
A138444
A137886
A097303
*
A075619
A055332
A288792
Adjacent sequences:
A067216
A067217
A067218
*
A067220
A067221
A067222
KEYWORD
nonn
,
more
AUTHOR
R. H. Hardin
, Feb 20 2002
EXTENSIONS
a(5)-a(6) from
Sean A. Irvine
, Dec 11 2023
STATUS
approved
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Last modified September 15 04:39 EDT 2024. Contains 375931 sequences. (Running on oeis4.)