OFFSET
0,3
COMMENTS
a(n) = abs(product( (p!)^2,p=0..n )*(n+1)!*LaguerreL(n+1,0,1)), n=0,1..., where LaguerreL(n,lambda,x) are generalized Laguerre polynomial.
FORMULA
MATHEMATICA
a[n_] := Table[Subfactorial[i+j+1], {i, 0, n}, {j, 0, n}] // Det // Abs;
Table[a[n], {n, 0, 9}] (* Jean-François Alcover, Aug 18 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Karol A. Penson, Dec 17 2004
STATUS
approved