Riordan array (1/(1-2x), x/((1-x)(1-2x))).

Terms

a(0) =1a(1) =2a(2) =1a(3) =4a(4) =5a(5) =1a(6) =8a(7) =17a(8) =8a(9) =1a(10) =16a(11) =49a(12) =39a(13) =11a(14) =1a(15) =32a(16) =129a(17) =150a(18) =70a(19) =14a(20) =1a(21) =64a(22) =321a(23) =501a(24) =338a(25) =110a(26) =17a(27) =1a(28) =128a(29) =769