Number of length n inversion sequences avoiding the patterns 000, 010, 100, 110, 120, and 210.

A279544

Number of length n inversion sequences avoiding the patterns 000, 010, 100, 110, 120, and 210.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =26a(6) =73a(7) =214a(8) =651a(9) =2040a(10) =6549a(11) =21453a(12) =71485a(13) =241702a(14) =827603a(15) =2865087a(16) =10014927a(17) =35307628a(18) =125427569a(19) =448616693a(20) =1614432373a(21) =5842129120a(22) =21247505098a(23) =77631329535a(24) =284832049361

External references