Number of permutations of 1..n avoiding adjacent step pattern up, up, up, up, up.
A177533
Number of permutations of 1..n avoiding adjacent step pattern up, up, up, up, up.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =719a(7) =5027a(8) =40168a(9) =361080a(10) =3606480a(11) =39623760a(12) =474915803a(13) =6166512899a(14) =86227808578
External references
- oeis: A177533