The number of permutations in S_n with strategic pile of size 3.
A267323
The number of permutations in S_n with strategic pile of size 3.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =3a(4) =12a(5) =66a(6) =432a(7) =3240a(8) =27360
External references
- oeis: A267323