75736domain: NAppears in sequencesa(n) = Sum_{k=0..n} binomial(k, 8*(n-k)).at n=20A306752Numerator of sum of reciprocals of all prime divisors of all positive integers <= n.at n=12A380314a(n) = Sum_{k=0..floor(3*n/8)} binomial(k+2,3*n-8*k).at n=48A390036a(n) = Sum_{k=0..floor(n/2)} binomial(k,4*n-8*k).at n=40A390220