Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={-2,0,1,2}.
A079981
Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=3, r=3, I={-2,0,1,2}.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =2a(7) =0a(8) =3a(9) =0a(10) =8a(11) =0a(12) =12a(13) =0a(14) =27a(15) =0a(16) =52a(17) =0a(18) =95a(19) =0a(20) =196a(21) =0a(22) =369a(23) =0a(24) =720a(25) =0a(26) =1408a(27) =0a(28) =2709a(29) =0
External references
- oeis: A079981