Number of permutations satisfying -k <= p(i) - i <= r and p(i) - i not in I, i=1..n, with k=1, r=4, I={0,3}.
A079973
Number of permutations satisfying -k <= p(i) - i <= r and p(i) - i not in I, i=1..n, with k=1, r=4, I={0,3}.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =3a(6) =2a(7) =5a(8) =6a(9) =8a(10) =14a(11) =16a(12) =27a(13) =36a(14) =51a(15) =77a(16) =103a(17) =155a(18) =216a(19) =309a(20) =448a(21) =628a(22) =912a(23) =1292a(24) =1849a(25) =2652a(26) =3769a(27) =5413a(28) =7713a(29) =11031
External references
- oeis: A079973