a(n) = Sum_{k=0..n} k^(2*n).A249459a(n) = Sum_{k=0..n} k^(2*n).Terms a(0) =1a(1) =1a(2) =17a(3) =794a(4) =72354a(5) =10874275a(6) =2438235715a(7) =762963987380External referencesoeis: A249459