Exponential reversion of sequence of involutions (A000085).
A050398
Exponential reversion of sequence of involutions (A000085).
Terms
- a(0) =1a(1) =-2a(2) =8a(3) =-50a(4) =434a(5) =-4864a(6) =66996a(7) =-1095324a(8) =20724756a(9) =-445310616a(10) =10708301328a(11) =-284863999848
External references
- oeis: A050398