OFFSET
0,4
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 0..200
FORMULA
binomial(binomial(2*n,n)/(n+1),4)
MAPLE
[seq (binomial(binomial(2*n, n)/(n+1), 4), n=0..24)];
MATHEMATICA
Binomial[CatalanNumber[Range[0, 20]], 4] (* Harvey P. Dale, Nov 05 2011 *)
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Zerinvary Lajos, May 29 2006
STATUS
approved