Number of length n inversion sequences avoiding the patterns 010 and 120.
A279559
Number of length n inversion sequences avoiding the patterns 010 and 120.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =52a(6) =201a(7) =845a(8) =3801a(9) =18089a(10) =90316a(11) =470010a(12) =2536077a(13) =14127741a(14) =80966690a(15) =475979359a(16) =2863157581a(17) =17585971037a(18) =110095460224a(19) =701418693025
External references
- oeis: A279559