a(n) = Sum_{k=0..n} k^(n+k).A368492a(n) = Sum_{k=0..n} k^(n+k).Terms a(0) =1a(1) =1a(2) =17a(3) =762a(4) =67788a(5) =10034459a(6) =2226678977a(7) =691532161356External referencesoeis: A368492