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={-1,2}.
A079990
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={-1,2}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =6a(5) =16a(6) =36a(7) =73a(8) =157a(9) =353a(10) =797a(11) =1776a(12) =3916a(13) =8636a(14) =19145a(15) =42504a(16) =94286a(17) =208948a(18) =462907a(19) =1025863a(20) =2274069a(21) =5040891a(22) =11173063a(23) =24763854a(24) =54886846a(25) =121655063a(26) =269646786a(27) =597664017a(28) =1324697483a(29) =2936135519
External references
- oeis: A079990