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

Terms

a(0) =1a(1) =4a(2) =-1a(3) =11a(4) =-6a(5) =1a(6) =26a(7) =-22a(8) =8a(9) =-1a(10) =57a(11) =-64a(12) =37a(13) =-10a(14) =1a(15) =120a(16) =-163a(17) =130a(18) =-56a(19) =12a(20) =-1a(21) =247a(22) =-382a(23) =386a(24) =-232a(25) =79a(26) =-14a(27) =1a(28) =502a(29) =-848