Number of length n inversion sequences avoiding the patterns 100, 101, and 201.

A279571

Number of length n inversion sequences avoiding the patterns 100, 101, and 201.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =22a(5) =92a(6) =424a(7) =2106a(8) =11102a(9) =61436a(10) =353980a(11) =2110366a(12) =12955020a(13) =81569168a(14) =525106698a(15) =3447244188a(16) =23028080268a(17) =156246994264

External references