68219860

Appears in sequences

• Row sums of triangle A054336 (central binomial convolutions).at n=20A054341
• G.f.: 1/(1 - 5*x*C(x)), where C(x) = (1 - sqrt(1 - 4*x))/(2*x) = g.f. for the Catalan numbers A000108.at n=10A076036