Riordan array (1/(1-3*x+x^2), x*(1-x)/(1-3*x+x^2)).

Terms

a(0) =1a(1) =3a(2) =1a(3) =8a(4) =5a(5) =1a(6) =21a(7) =19a(8) =7a(9) =1a(10) =55a(11) =65a(12) =34a(13) =9a(14) =1a(15) =144a(16) =210a(17) =141a(18) =53a(19) =11a(20) =1a(21) =377a(22) =654a(23) =534a(24) =257a(25) =76a(26) =13a(27) =1a(28) =987a(29) =1985