Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, down, down, up.
A177525
Number of permutations of {1,...,n} avoiding adjacent step pattern up, down, down, down, up.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =701a(7) =4774a(8) =37128a(9) =324576a(10) =3153961a(11) =33709743a(12) =393044544a(13) =4964774568a(14) =67536381485a(15) =984328864872
External references
- oeis: A177525