Number of permutations of 1..n with all adjacent differences <= 9 in absolute value.
A177281
Number of permutations of 1..n with all adjacent differences <= 9 in absolute value.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =120a(6) =720a(7) =5040a(8) =40320a(9) =362880a(10) =3628800a(11) =32659200a(12) =267805440a(13) =2033498880a(14) =14563332000a(15) =100185340320a(16) =672903217200
External references
- oeis: A177281