Number of degree-n permutations such that number of cycles of size k is odd (or zero) for every k.
A130263
Number of degree-n permutations such that number of cycles of size k is odd (or zero) for every k.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =6a(4) =14a(5) =85a(6) =529a(7) =3451a(8) =26816a(9) =243909a(10) =2507333a(11) =26196841a(12) =323194816a(13) =4086482335a(14) =57669014597a(15) =864137455455
External references
- oeis: A130263