OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..76
FORMULA
a(n) = A322280(n,n).
a(n) == n (mod 2) for n >= 1.
MATHEMATICA
nmax = 76;
a[n_] := 2^(n(n-1)/2)*n!*SeriesCoefficient[Sum[x^i/(2^(i(i-1)/2)*i!), {i, 0, nmax}]^n, {x, 0, n}];
Table[a[n], {n, 0, nmax}] (* Jean-François Alcover, May 28 2024 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 16 2024
STATUS
approved