Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, down, down, down, up.
A177535
Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, down, down, down, up.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5011a(8) =39856a(9) =356616a(10) =3545280a(11) =38768400a(12) =462487631a(13) =5977005477a(14) =83186290826
External references
- oeis: A177535