Central coefficients of the Riordan matrix ((1-x-x^2)/(1-2x-x^2),(x-x^2-x^3)/(1-2x-x^2)) (A190215).

A190315

Central coefficients of the Riordan matrix ((1-x-x^2)/(1-2x-x^2),(x-x^2-x^3)/(1-2x-x^2)) (A190215).

Terms

    a(0) =1a(1) =2a(2) =9a(3) =48a(4) =265a(5) =1500a(6) =8638a(7) =50360a(8) =296325a(9) =1756160a(10) =10467556a(11) =62683896a(12) =376838098a(13) =2272896626a(14) =13747543035a(15) =83354081728a(16) =506467851061

External references