Number of inversion sequences of length n avoiding the consecutive patterns 012, 021, 010, 120.

A328358

Number of inversion sequences of length n avoiding the consecutive patterns 012, 021, 010, 120.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =10a(5) =30a(6) =100a(7) =376a(8) =1566a(9) =7094a(10) =34751a(11) =182841a(12) =1026167a(13) =6112799a(14) =38489481a(15) =255204077a(16) =1776046697a(17) =12936265145a(18) =98368170749a(19) =779127467795

External references