Number of permutations of n objects such that no four-element subset is preserved.
A213323
Number of permutations of n objects such that no four-element subset is preserved.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =0a(5) =44a(6) =304a(7) =2568a(8) =26704a(9) =200240a(10) =1931616a(11) =20849696a(12) =246556672a(13) =3300906816a(14) =46382446720a(15) =695413794944
External references
- oeis: A213323