Riordan matrix ( (1-2x)/(1-2x-x^2), (x-2x^2)/(1-2x-x^2) ).

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =0a(5) =1a(6) =2a(7) =2a(8) =0a(9) =1a(10) =5a(11) =4a(12) =3a(13) =0a(14) =1a(15) =12a(16) =11a(17) =6a(18) =4a(19) =0a(20) =1a(21) =29a(22) =28a(23) =18a(24) =8a(25) =5a(26) =0a(27) =1a(28) =70a(29) =72