Number of permutations of n objects such that no three-element subset is preserved.
A213322
Number of permutations of n objects such that no three-element subset is preserved.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =0a(4) =9a(5) =54a(6) =459a(7) =2568a(8) =20145a(9) =176076a(10) =1833741a(11) =20148336a(12) =241870617a(13) =3132196560a(14) =43874128089a(15) =658195206264
External references
- oeis: A213322