Number of cyclic patterns of length n that avoid the vincular pattern 23-1-4.

A346660

Number of cyclic patterns of length n that avoid the vincular pattern 23-1-4.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =2a(4) =5a(5) =14a(6) =42a(7) =133a(8) =442a(9) =1537a(10) =5583a(11) =21165a(12) =83707a(13) =345324a(14) =1485687a(15) =6663354a(16) =31134078a(17) =151408319a(18) =765462514a(19) =4017644518a(20) =21860398111a(21) =123120413119a(22) =716701884408

External references