18188478domain: NAppears in sequencesa(n) = Sum_{i=1..n} C(i+4,5)^3.at n=5A086026a(n) = Sum_{k=0..n} binomial(n+k,k)^3.at n=5A112028a(n) = Sum_{k = 0..n-1} binomial(n+k-1, k)^3 (same as A112028 with an extra 0 at the start).at n=6A375178