Number of permutations of 1..n with i-10 <= p(i) <= i+5.

Terms

a(0) =1a(1) =2a(2) =6a(3) =24a(4) =120a(5) =720a(6) =4320a(7) =25920a(8) =155520a(9) =933120a(10) =5598720a(11) =31717320a(12) =173822136a(13) =939044202a(14) =5067707074a(15) =27561477307a(16) =151889090893a(17) =842976736704