Number of permutations of {1,...,n} avoiding adjacent step pattern up, up, down, up, up.
A177532
Number of permutations of {1,...,n} avoiding adjacent step pattern up, up, down, up, up.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =701a(7) =4774a(8) =37128a(9) =326089a(10) =3184221a(11) =34191983a(12) =400308461a(13) =5076257396a(14) =69329710171
External references
- oeis: A177532