Number of inversion sequences of length n avoiding the consecutive patterns 000, 001, 011, 012.

A328357

Number of inversion sequences of length n avoiding the consecutive patterns 000, 001, 011, 012.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =1a(4) =4a(5) =6a(6) =36a(7) =117a(8) =804a(9) =4266a(10) =33768a(11) =249144a(12) =2289348a(13) =21353472a(14) =227212824a(15) =2533824900a(16) =30914509212a(17) =398623158096

External references