Number of length n inversion sequences avoiding the patterns 110, 120, and 210.
A279569
Number of length n inversion sequences avoiding the patterns 110, 120, and 210.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =22a(5) =91a(6) =409a(7) =1953a(8) =9763a(9) =50583a(10) =269697a(11) =1472080a(12) =8193306a(13) =46359256a(14) =266023710a(15) =1545165168a(16) =9070274236a(17) =53739936609a(18) =321025143482
External references
- oeis: A279569