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

Terms

a(0) =1a(1) =2a(2) =-1a(3) =4a(4) =-4a(5) =1a(6) =6a(7) =-11a(8) =6a(9) =-1a(10) =8a(11) =-24a(12) =22a(13) =-8a(14) =1a(15) =10a(16) =-45a(17) =62a(18) =-37a(19) =10a(20) =-1a(21) =12a(22) =-76a(23) =147a(24) =-128a(25) =56a(26) =-12a(27) =1a(28) =14a(29) =-119