A303000 a(n) = permanent of the n X n matrix with entries a(i, i) = i^2 and a(i, j) = 1 elsewhere.

1, 5, 52, 918, 24630, 934938, 47736048, 3157054776, 262661665176, 26857133054424, 3311299323349920, 484541686800059760, 83031688670103506160, 16472545369548670950480, 3746065113561656467249920, 968109978211279792380074880, 282158259444905145777416119680

Offset

1,2

Links

Vaclav Kotesovec, Table of n, a(n) for n = 1..36

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

Cf. A007840, A010791, A067550, A118714, A303001.

Sequence in context: A099977 A274257 A336609 * A278879 A322195 A216464

Adjacent sequences: A302997 A302998 A302999 * A303001 A303002 A303003

Keyword

nonn

Author

Vaclav Kotesovec, Apr 17 2018

Status

approved