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

Terms

a(0) =1a(1) =3a(2) =1a(3) =11a(4) =6a(5) =1a(6) =45a(7) =31a(8) =9a(9) =1a(10) =195a(11) =156a(12) =60a(13) =12a(14) =1a(15) =873a(16) =781a(17) =360a(18) =98a(19) =15a(20) =1a(21) =3989a(22) =3906a(23) =2055a(24) =684a(25) =145a(26) =18a(27) =1a(28) =18483a(29) =19531