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

Terms

a(0) =1a(1) =3a(2) =1a(3) =5a(4) =7a(5) =1a(6) =7a(7) =25a(8) =11a(9) =1a(10) =9a(11) =63a(12) =61a(13) =15a(14) =1a(15) =11a(16) =129a(17) =231a(18) =113a(19) =19a(20) =1a(21) =13a(22) =231a(23) =681a(24) =575a(25) =181a(26) =23a(27) =1a(28) =15a(29) =377