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A278844
a(n) = permanent M_n where M_n is the n X n matrix m(i,j) = (Catalan(i+j))^2.
1
1, 4, 1409, 61813936, 405546824579185, 444429790193462299152820, 87560380592182813232163111416947497, 3267701159348966740482726536189228228570094452288, 24017165813923278639658993746183865352216465064857235206429739929
OFFSET
0,2
MATHEMATICA
Flatten[{1, Table[Permanent[Table[CatalanNumber[i+j]^2, {i, 1, n}, {j, 1, n}]], {n, 1, 12}]}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Nov 29 2016
STATUS
approved