Sum (number of cycles)^2 over all n! permutations of [1..n].
A151881
Sum (number of cycles)^2 over all n! permutations of [1..n].
Terms
- a(0) =1a(1) =5a(2) =23a(3) =120a(4) =724a(5) =5012a(6) =39332a(7) =345832a(8) =3371976a(9) =36135792a(10) =422379792a(11) =5349561984a(12) =72996193152
External references
- oeis: A151881