46011772521domain: NAppears in sequencesa(n) = Sum_{i=1..n} C(i+6,7)^3.at n=7A086030a(n) = Sum_{k=0..n} binomial(n+k,k)^3.at n=7A112028a(n) = Sum_{k = 0..n-1} binomial(n+k-1, k)^3 (same as A112028 with an extra 0 at the start).at n=8A375178