Number of length n inversion sequences avoiding the patterns 100, 102, and 201.

A279562

Number of length n inversion sequences avoiding the patterns 100, 102, and 201.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =21a(5) =78a(6) =299a(7) =1176a(8) =4729a(9) =19378a(10) =80667a(11) =340260a(12) =1451277a(13) =6248758a(14) =27124703a(15) =118576648a(16) =521574769a(17) =2306766426a(18) =10251761219a(19) =45759404076a(20) =205050758165a(21) =922104978430

External references