Number of Dyck paths of semilength n avoiding the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
A243412
Number of Dyck paths of semilength n avoiding the consecutive steps UDUUDU (with U=(1,1), D=(1,-1)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =13a(5) =37a(6) =112a(7) =352a(8) =1136a(9) =3742a(10) =12529a(11) =42513a(12) =145868a(13) =505234a(14) =1764157a(15) =6203370a(16) =21947490a(17) =78072209a(18) =279062937a(19) =1001803617a(20) =3610366030a(21) =13057141261a(22) =47373444827a(23) =172381857939a(24) =628944880851
External references
- oeis: A243412