3760269946domain: NAppears in sequencesExpansion of 1/(1 - x^3/(1-x)^5).at n=27A369804a(n) = Sum_{k=0..floor(2*n/5)} binomial(2*n-2*k,3*k).at n=22A392401a(n) = Sum_{k=0..floor(2*n/3)} binomial(2*k,2*n-3*k).at n=33A392428