A293707 Permanent of a Hankel matrix with factorial elements.

2, 84, 137664, 14784353280, 159433923516825600, 247133428169618164285440000, 74871582187843476288006745227264000000, 5793842294883032778309293201687815335916339200000000, 145059336151890972759838967800541420103566785450351578316800000000000

Offset: 1

Author

Vaclav Kotesovec, Apr 17 2018

Keywords

• nonn

Links

• Vaclav Kotesovec, Table of n, a(n) for n = 1..28

Crossrefs

Cf. A108078.

Programs

Mathematica

Table[Permanent[Table[(i + j)!, {i, 1, n}, {j, 1, n}]], {n, 1, 15}]

PARI

{a(n) = matpermanent(matrix(n, n, i, j, (i+j)!))}
for(n=1, 10, print1(a(n), ", ")) \\ Vaclav Kotesovec, Dec 21 2018