a(n) = Sum_{k=0..floor(n/2)} n^k * |Stirling1(n,2*k)|.
A357683
a(n) = Sum_{k=0..floor(n/2)} n^k * |Stirling1(n,2*k)|.
Terms
- a(0) =1a(1) =0a(2) =2a(3) =9a(4) =60a(5) =500a(6) =4920a(7) =55566a(8) =706720a(9) =9979200a(10) =154706760a(11) =2609691700a(12) =47547916416a(13) =929943488448
External references
- oeis: A357683