Number of indecomposable permutations avoiding the pattern 2143.

A284716

Number of indecomposable permutations avoiding the pattern 2143.

Terms

    a(0) =1a(1) =1a(2) =3a(3) =13a(4) =63a(5) =330a(6) =1838a(7) =10758a(8) =65586a(9) =413639a(10) =2684469a(11) =17852715a(12) =121256457a(13) =838843641a(14) =5897455515a(15) =42058344077a(16) =303787163823

External references