OFFSET
0,3
LINKS
Andrew Howroyd, Table of n, a(n) for n = 0..50
PROG
(PARI) { A122801(n) = binomial(2*n-1, n) * sum(k=0, n, binomial(n, k) * (-1)^k * (2^(n-k)-1)^n ); }
CROSSREFS
KEYWORD
nonn
AUTHOR
Max Alekseyev, Sep 11 2006
EXTENSIONS
Terms a(11) and beyond from Andrew Howroyd, Nov 07 2019
STATUS
approved