Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={0,1}.
A080007
Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={0,1}.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =1a(4) =2a(5) =4a(6) =4a(7) =8a(8) =19a(9) =32a(10) =56a(11) =97a(12) =180a(13) =336a(14) =592a(15) =1064a(16) =1925a(17) =3488a(18) =6312a(19) =11345a(20) =20486a(21) =37028a(22) =66852a(23) =120688a(24) =217767a(25) =393216a(26) =710032a(27) =1281729a(28) =2313896a(29) =4177216
External references
- oeis: A080007