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={1}.
A079996
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={1}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =11a(5) =33a(6) =82a(7) =198a(8) =516a(9) =1389a(10) =3690a(11) =9642a(12) =25143a(13) =65867a(14) =173092a(15) =454578a(16) =1192227a(17) =3125940a(18) =8198836a(19) =21509532a(20) =56429115a(21) =148023671a(22) =388279519a(23) =1018515853a(24) =2671777153a(25) =7008626377a(26) =18384947908a(27) =48227023198a(28) =126508325008
External references
- oeis: A079996