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A278857
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a(n) = permanent M_n where M_n is the n X n matrix m(i,j) = (i-j)^2.
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2
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1, 0, 1, 8, 676, 49600, 10335908, 2658757248, 1214367336000, 730771063280640, 642638269862752320, 736176718456263406080, 1122592471007868379259136, 2168016139899273930219233280, 5288852927890824307509101287680, 15889369670472598370104100032512000
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OFFSET
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0,4
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LINKS
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MAPLE
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with(LinearAlgebra):
a:= n-> `if`(n=0, 1, Permanent(Matrix(n, (i, j)-> (i-j)^2))):
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MATHEMATICA
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Flatten[{1, Table[Permanent[Table[(i-j)^2, {i, 1, n}, {j, 1, n}]], {n, 1, 15}]}]
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PROG
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(PARI) {a(n) = matpermanent(matrix(n, n, i, j, (i-j)^2))}
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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