OFFSET
0,3
LINKS
G. C. Greubel, Table of n, a(n) for n = 0..80
FORMULA
a(n) = 2^(n*(n-3)/2)*binomial(2*n, n).
a(n) = 2^C(n,2)*Hypergeometric2F1((1-n)/2,-n/2;1;1).
MATHEMATICA
f[n_] := 2^(n (n - 3)/2) Binomial[2 n, n]; (* Or *)
f[n_] := 2^(n (n - 1)/2) Hypergeometric2F1[(1 - n)/2, -n/2, 1, 1]; Array[f, 15, 0] (* Robert G. Wilson v *)
PROG
(PARI) a(n) = matdet(matrix(n, n, i, j, binomial(2*i-1, j))); \\ Michel Marcus, Dec 12 2014
(PARI) for(n=0, 30, print1(2^(n*(n-3)/2)*binomial(2*n, n), ", ")) \\ G. C. Greubel, Jan 25 2018
(Magma) [2^(n*(n-3)/2)*Binomial(2*n, n): n in [0..30]]; // G. C. Greubel, Jan 25 2018
CROSSREFS
KEYWORD
nonn
AUTHOR
Benoit Cloitre, Aug 28 2003
STATUS
approved