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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =5a(5) =1a(6) =1a(7) =13a(8) =9a(9) =1a(10) =1a(11) =25a(12) =41a(13) =13a(14) =1a(15) =1a(16) =41a(17) =129a(18) =85a(19) =17a(20) =1a(21) =1a(22) =61a(23) =321a(24) =377a(25) =145a(26) =21a(27) =1a(28) =1a(29) =85