Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=1, r=5, I={1,4}.
A079961
Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=1, r=5, I={1,4}.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =4a(5) =6a(6) =10a(7) =17a(8) =28a(9) =46a(10) =77a(11) =128a(12) =212a(13) =352a(14) =585a(15) =971a(16) =1612a(17) =2677a(18) =4445a(19) =7380a(20) =12254a(21) =20347a(22) =33784a(23) =56095a(24) =93141a(25) =154652a(26) =256785a(27) =426368a(28) =707945a(29) =1175477
External references
- oeis: A079961