Triangle read by rows: Riordan array (1/(1 - x), (1 + x)/(1 - x - x^2)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =1a(4) =5a(5) =4a(6) =1a(7) =10a(8) =16a(9) =8a(10) =1a(11) =18a(12) =45a(13) =44a(14) =16a(15) =1a(16) =31a(17) =107a(18) =158a(19) =112a(20) =32a(21) =1a(22) =52a(23) =232a(24) =461a(25) =488a(26) =272a(27) =64a(28) =1a(29) =86