Riordan matrix (1/(x+sqrt(1-4x)),(1-sqrt(1-4x))/(2(x+sqrt(1-4x)))).

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =1a(6) =9a(7) =11a(8) =5a(9) =1a(10) =29a(11) =40a(12) =23a(13) =7a(14) =1a(15) =97a(16) =147a(17) =99a(18) =39a(19) =9a(20) =1a(21) =333a(22) =544a(23) =413a(24) =194a(25) =59a(26) =11a(27) =1a(28) =1165a(29) =2025