Number of permutations (p(1), p(2), ..., p(n)) satisfying -k <= p(i)-i <= r and p(i)-i not in the set I, i=1..n, with k=2, r=6, I={-1,1,2,3,4,5}.
A224808
Number of permutations (p(1), p(2), ..., p(n)) satisfying -k <= p(i)-i <= r and p(i)-i not in the set I, i=1..n, with k=2, r=6, I={-1,1,2,3,4,5}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =2a(8) =4a(9) =6a(10) =9a(11) =12a(12) =16a(13) =20a(14) =25a(15) =35a(16) =49a(17) =70a(18) =100a(19) =140a(20) =196a(21) =266a(22) =361a(23) =494a(24) =676a(25) =936a(26) =1296a(27) =1800a(28) =2500a(29) =3450
External references
- oeis: A224808