Number of permutations of 1..n with all adjacent differences <= 6 in absolute value.
A177278
Number of permutations of 1..n with all adjacent differences <= 6 in absolute value.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5040a(8) =30240a(9) =159840a(10) =773040a(11) =3556752a(12) =16068708a(13) =72870932a(14) =336443754a(15) =1563452344a(16) =7255541240a(17) =33461906400a(18) =153007409088a(19) =693538405248
External references
- oeis: A177278