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A261815
Total number of semimagic squares of order n that can be formed from the numbers 1, ..., n^2.
1
1, 0, 72, 549504, 4632344409600
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OFFSET
1,3
LINKS
Table of n, a(n) for n=1..5.
Wikipedia,
Magic graph
Index entries for sequences related to magic squares
FORMULA
a(n) =
A261816
(n)*
A048617
(n) for n > 1.
CROSSREFS
Cf.
A006052
,
A048617
,
A261816
.
Sequence in context:
A135320
A135427
A028671
*
A159440
A308586
A113889
Adjacent sequences:
A261812
A261813
A261814
*
A261816
A261817
A261818
KEYWORD
nonn
,
hard
,
more
AUTHOR
Arkadiusz Wesolowski
, Nov 18 2015
STATUS
approved
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Last modified April 18 20:26 EDT 2024. Contains 371781 sequences. (Running on oeis4.)