Number of permutations of length n with spread 3.
A004246
Number of permutations of length n with spread 3.
Terms
- a(0) =8a(1) =25a(2) =144a(3) =735a(4) =4608a(5) =39285a(6) =362000a(7) =3628185a(8) =40808448a(9) =478988081a(10) =6227101888a(11) =87248724750
External references
- oeis: A004246