8671852domain: NAppears in sequencesQuintisection of 1/(1-x^5-x^6).at n=28A099132Number of compositions of 6*n-4 into parts 5 and 6.at n=23A373964a(n) = Sum_{k=0..floor(3*n/5)} binomial(k+1,3*n-5*k).at n=45A391843