Number of length n inversion sequences avoiding the patterns 010, 120, and 210.
A279558
Number of length n inversion sequences avoiding the patterns 010, 120, and 210.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =200a(7) =830a(8) =3654a(9) =16869a(10) =80963a(11) =401300a(12) =2043610a(13) =10649335a(14) =56604706a(15) =306101789a(16) =1680515427a(17) =9350151066a(18) =52644525981a(19) =299573440044
External references
- oeis: A279558