Number of permutations of length n with spread 1.
A004205
Number of permutations of length n with spread 1.
Terms
- a(0) =1a(1) =3a(2) =8a(3) =25a(4) =108a(5) =735a(6) =4608a(7) =40824a(8) =362000a(9) =3628185a(10) =40766976a(11) =478988081a(12) =6227101888a(13) =87146087625
External references
- oeis: A004205