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A303000
a(n) = permanent of the n X n matrix with entries a(i, i) = i^2 and a(i, j) = 1 elsewhere.
2
1, 5, 52, 918, 24630, 934938, 47736048, 3157054776, 262661665176, 26857133054424, 3311299323349920, 484541686800059760, 83031688670103506160, 16472545369548670950480, 3746065113561656467249920, 968109978211279792380074880, 282158259444905145777416119680
OFFSET
1,2
LINKS
MATHEMATICA
Table[Permanent[DiagonalMatrix[Table[i^2-1, {i, 1, n}]] + 1], {n, 1, 20}]
PROG
(PARI) {a(n) = matpermanent(matrix(n, n, i, j, if(i==j, i^2, 1)))}
for(n=1, 20, print1(a(n), ", ")) \\ Vaclav Kotesovec, Dec 20 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Apr 17 2018
STATUS
approved