219925domain: NAppears in sequencesa(n) = a(n-1) + a(n-6), with a(i) = 1 for i = 0..5.at n=52A005708Number of compositions of 6*n-2 into parts 1 and 6.at n=8A373302a(n) = Sum_{k=0..floor(n/3)} binomial(2*n-5*k,k).at n=26A373639