Expansion of g.f. f/(1+2*f) where f is the g.f. of nonempty permutations.
A355488
Expansion of g.f. f/(1+2*f) where f is the g.f. of nonempty permutations.
Terms
- a(0) =0a(1) =1a(2) =0a(3) =2a(4) =8a(5) =48a(6) =328a(7) =2560a(8) =22368a(9) =216224a(10) =2291456a(11) =26430336a(12) =329805952a(13) =4429255168a(14) =63730438656a(15) =978479250944
External references
- oeis: A355488