Search: id:A127235
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%I A127235
%S A127235 1,4,4320,11496038400,291948240981196800000,
%T A127235 190982059064777562218142105600000000,
%U A127235 7081230833474514688657438735472338312479375360000000000
%N A127235 a(n) = n! (2*sum(1..n-1))!.
%C A127235 Number of distinct n x n matrices containing n^2 different elements which 
               have that same trace.
%t A127235 Table[n! (2*Sum[x, {x, 1, n - 1}])!, {n, 1, 10}]
%Y A127235 Cf. A127233, A127234.
%Y A127235 Sequence in context: A067482 A013830 A079682 this_sequence A102205 A046360 
               A079232
%Y A127235 Adjacent sequences: A127232 A127233 A127234 this_sequence A127236 A127237 
               A127238
%K A127235 nonn
%O A127235 1,2
%A A127235 Artur Jasinski (grafix(AT)csl.pl), Jan 09 2007, Jan 11 2007

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