1357136domain: NAppears in sequencesQuintisection of 1/(1-x^5-x^6).at n=25A099132a(n) = Sum_{k=0..n} binomial(n^2 - k,n*k).at n=5A348315Number of compositions of 6*n-1 into parts 5 and 6.at n=20A373961a(n) = Sum_{k=0..floor(3*n/5)} binomial(k+1,3*n-5*k).at n=40A391843