OFFSET
0,2
LINKS
Jinyuan Wang, Table of n, a(n) for n = 0..84
PROG
(PARI) T(n, k)=if(n==0 || k==0, 1, sum(i=0, n, T(k-1, i)*T(k-1, n-i)));
a(n)=T(n, n);
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Mar 30 2004
EXTENSIONS
More terms from Jinyuan Wang, Feb 28 2020
STATUS
approved