Number of permutations of length n with exactly 1 rising or falling succession.
A086852
Number of permutations of length n with exactly 1 rising or falling succession.
Terms
- a(0) =0a(1) =0a(2) =2a(3) =4a(4) =10a(5) =40a(6) =230a(7) =1580a(8) =12434a(9) =110320a(10) =1090270a(11) =11876980a(12) =141373610a(13) =1825321016a(14) =25405388150a(15) =379158271420
External references
- oeis: A086852