Riordan array (1/sqrt(1-6x+5x^2),(1-3x-sqrt(1-6x+5x^2))/(2x)).

Terms

a(0) =1a(1) =3a(2) =1a(3) =11a(4) =6a(5) =1a(6) =45a(7) =30a(8) =9a(9) =1a(10) =195a(11) =144a(12) =58a(13) =12a(14) =1a(15) =873a(16) =685a(17) =330a(18) =95a(19) =15a(20) =1a(21) =3989a(22) =3258a(23) =1770a(24) =630a(25) =141a(26) =18a(27) =1a(28) =18483a(29) =15533