a(n) = Sum_{k = 0..n} C(n,k)^9.A182446a(n) = Sum_{k = 0..n} C(n,k)^9.Terms a(0) =1a(1) =2a(2) =514a(3) =39368a(4) =10601986a(5) =2003906252a(6) =588906874144External referencesoeis: A182446