Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, up, up, up.
A177530
Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, up, up, up.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =706a(7) =4844a(8) =37968a(9) =334656a(10) =3278896a(11) =35330098a(12) =415289184a(13) =5288377848a(14) =72522052240
External references
- oeis: A177530