Number of permutations of 1..n arranged in a circle with exactly 4 local maxima.
A159712
Number of permutations of 1..n arranged in a circle with exactly 4 local maxima.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =2176a(9) =71424a(10) =1372160a(11) =20252672a(12) =255040512a(13) =2891180032a(14) =30447656960a(15) =303926476800
External references
- oeis: A159712