Number of permutations of length n containing exactly 1 occurrence of 12345 and 1 occurrence of 12354.
A224297
Number of permutations of length n containing exactly 1 occurrence of 12345 and 1 occurrence of 12354.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =2a(7) =56a(8) =984a(9) =14004a(10) =177140a(11) =2083560a(12) =23374060a(13) =254007320a(14) =2700941710a(15) =28293706782a(16) =293369952474
External references
- oeis: A224297