OFFSET
0,2
FORMULA
a(n) = abs(A137452(2*n, n)).
MAPLE
a := n -> binomial(2*n - 1, n - 1)*(2*n)^n;
seq(a(n), n = 0..15);
MATHEMATICA
A367254[n_]:=If[n==0, 1, Binomial[2n-1, n-1](2n)^n];
Array[A367254, 20, 0] (* Paolo Xausa, Dec 01 2023 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
Peter Luschny, Nov 11 2023
STATUS
approved