Sum of orders of all even permutations of n letters.
A060015
Sum of orders of all even permutations of n letters.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =31a(4) =211a(5) =1411a(6) =12601a(7) =137047a(8) =1516831a(9) =18111751a(10) =223179001a(11) =2973194071a(12) =46287964867a(13) =835826439631
External references
- oeis: A060015