Number of permutations of 1..n with i-9<=p(i)<=i+7.
A179360
Number of permutations of 1..n with i-9<=p(i)<=i+7.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =5040a(7) =40320a(8) =322560a(9) =2580480a(10) =18915120a(11) =129780720a(12) =851778120a(13) =5451917784a(14) =34566749214a(15) =219680806598
External references
- oeis: A179360