Number of ascent sequences of length n with exactly five flat steps.

A242158

Number of ascent sequences of length n with exactly five flat steps.

Terms

    a(0) =1a(1) =6a(2) =42a(3) =280a(4) =2016a(5) =15372a(6) =125202a(7) =1086624a(8) =10032165a(9) =98284186a(10) =1019176158a(11) =11158475328a(12) =128679348616

External references