3rd-order Vatalan numbers (generalization of Catalan numbers).
A025756
3rd-order Vatalan numbers (generalization of Catalan numbers).
Terms
- a(0) =1a(1) =1a(2) =4a(3) =22a(4) =139a(5) =949a(6) =6808a(7) =50548a(8) =384916a(9) =2988418a(10) =23559826a(11) =188061592a(12) =1516680130a(13) =12337999870a(14) =101111413540a(15) =833914857316
External references
- oeis: A025756