OFFSET
0,2
LINKS
FORMULA
MATHEMATICA
a[n_] := 2*n*(2*n)!; Array[a, 14, 0] (* Amiram Eldar, Feb 14 2021 *)
PROG
(PARI) for(n=0, 22, print((2*n)*(2*n)!))
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Jason Earls, Jul 18 2001
STATUS
approved