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

Terms

a(0) =1a(1) =4a(2) =1a(3) =16a(4) =7a(5) =1a(6) =64a(7) =38a(8) =10a(9) =1a(10) =256a(11) =187a(12) =69a(13) =13a(14) =1a(15) =1024a(16) =874a(17) =406a(18) =109a(19) =16a(20) =1a(21) =4096a(22) =3958a(23) =2186a(24) =748a(25) =158a(26) =19a(27) =1a(28) =16384a(29) =17548