Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, down, down, down, down.

A177534

Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, down, down, down, down.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5034a(8) =40224a(9) =361584a(10) =3611520a(11) =39679200a(12) =475580160a(13) =6175139244a(14) =86348433264

External references