Number of base pyramids in all dispersed Dyck paths of length n (i.e., in all Motzkin paths of length n with no (1,0)-steps at positive heights).

A191394

Number of base pyramids in all dispersed Dyck paths of length n (i.e., in all Motzkin paths of length n with no (1,0)-steps at positive heights).

Terms

    a(0) =0a(1) =0a(2) =1a(3) =2a(4) =6a(5) =12a(6) =28a(7) =56a(8) =121a(9) =242a(10) =507a(11) =1014a(12) =2093a(13) =4186a(14) =8569a(15) =17138a(16) =34902a(17) =69804a(18) =141664a(19) =283328a(20) =573574a(21) =1147148a(22) =2318010a(23) =4636020a(24) =9354540a(25) =18709080a(26) =37708672a(27) =75417344a(28) =151868100a(29) =303736200

External references