Number of primitive Dyck factors in all skew Dyck paths of semilength n.

A129156

Number of primitive Dyck factors in all skew Dyck paths of semilength n.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =10a(4) =36a(5) =136a(6) =532a(7) =2139a(8) =8796a(9) =36859a(10) =156946a(11) =677514a(12) =2959669a(13) =13063493a(14) =58184838a(15) =261230814a(16) =1181144792a(17) =5374078726a(18) =24588562675a(19) =113067256235a(20) =522270436044

External references