OFFSET
0,2
LINKS
Vaclav Kotesovec, Table of n, a(n) for n = 0..36
FORMULA
a(n) ~ c * d^n * n!^2 / sqrt(n), where d = 3.63208011334048289... and c = 1.47836065972078...
MAPLE
with(LinearAlgebra):
a:= n-> `if`(n=0, 1, Permanent(Matrix(n, (i, j)-> 2*i+j))):
seq(a(n), n=0..16);
MATHEMATICA
Flatten[{1, Table[Permanent[Table[2*i+j, {i, 1, n}, {j, 1, n}]], {n, 1, 15}]}]
PROG
(PARI) {a(n) = matpermanent(matrix(n, n, i, j, 2*i+j))}
for(n=0, 20, print1(a(n), ", ")) \\ Vaclav Kotesovec, Dec 21 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Dec 01 2016
STATUS
approved