Number of permutations satisfying -k <= p(i) - i <= r and p(i) - i not in I, i=1..n, with k=1, r=5, I={2,3}.
A079960
Number of permutations satisfying -k <= p(i) - i <= r and p(i) - i not in I, i=1..n, with k=1, r=5, I={2,3}.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =9a(6) =16a(7) =28a(8) =49a(9) =85a(10) =148a(11) =258a(12) =450a(13) =785a(14) =1369a(15) =2387a(16) =4162a(17) =7257a(18) =12654a(19) =22065a(20) =38475a(21) =67089a(22) =116983a(23) =203983a(24) =355685a(25) =620208a(26) =1081457a(27) =1885737a(28) =3288160a(29) =5733565
External references
- oeis: A079960