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%I #4 Nov 29 2016 07:13:29
%S 1,4,1409,61813936,405546824579185,444429790193462299152820,
%T 87560380592182813232163111416947497,
%U 3267701159348966740482726536189228228570094452288,24017165813923278639658993746183865352216465064857235206429739929
%N a(n) = permanent M_n where M_n is the n X n matrix m(i,j) = (Catalan(i+j))^2.
%t Flatten[{1, Table[Permanent[Table[CatalanNumber[i+j]^2, {i, 1, n}, {j, 1, n}]], {n, 1, 12}]}]
%Y Cf. A000108, A277829, A278770, A278843.
%K nonn
%O 0,2
%A _Vaclav Kotesovec_, Nov 29 2016
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