a(n) = E(n+1) - 2*E(n), where E(i) is the Euler number A000111(i).
A000708
a(n) = E(n+1) - 2*E(n), where E(i) is the Euler number A000111(i).
Terms
- a(0) =-1a(1) =-1a(2) =0a(3) =1a(4) =6a(5) =29a(6) =150a(7) =841a(8) =5166a(9) =34649a(10) =252750a(11) =1995181a(12) =16962726a(13) =154624469a(14) =1505035350a(15) =15583997521a(16) =171082318686
External references
- oeis: A000708