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A127235 a(n) = n! (2*sum(1..n-1))!. 2
1, 4, 4320, 11496038400, 291948240981196800000, 190982059064777562218142105600000000, 7081230833474514688657438735472338312479375360000000000 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Number of distinct n x n matrices containing n^2 different elements which have that same trace.
LINKS
MATHEMATICA
Table[n! (2*Sum[x, {x, 1, n - 1}])!, {n, 1, 10}]
CROSSREFS
Sequence in context: A067482 A249804 A079682 * A274972 A344670 A344671
KEYWORD
nonn
AUTHOR
Artur Jasinski, Jan 09 2007, Jan 11 2007
STATUS
approved

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Last modified June 25 06:01 EDT 2024. Contains 373697 sequences. (Running on oeis4.)