Number of permutations of {1..n} with fewer than 7 interior elements having values lying between the values of their neighbors.
A226440
Number of permutations of {1..n} with fewer than 7 interior elements having values lying between the values of their neighbors.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5040a(8) =40320a(9) =362878a(10) =3627778a(11) =39830282a(12) =475089392a(13) =6094561180a(14) =83333937940
External references
- oeis: A226440