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={0,4}.
A079964
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={0,4}.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =2a(6) =5a(7) =5a(8) =10a(9) =13a(10) =22a(11) =30a(12) =50a(13) =70a(14) =112a(15) =163a(16) =254a(17) =375a(18) =579a(19) =862a(20) =1320a(21) =1979a(22) =3015a(23) =4536a(24) =6893a(25) =10392a(26) =15764a(27) =23800a(28) =36064a(29) =54492
External references
- oeis: A079964