Square array read by antidiagonals of T(n,k)=(4k-2)*T(n,k-1)+T(n,k-2) with T(n,0)=1 and T(n,1)=n.

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =1a(6) =10a(7) =7a(8) =2a(9) =1a(10) =141a(11) =71a(12) =13a(13) =3a(14) =1a(15) =2548a(16) =1001a(17) =132a(18) =19a(19) =4a(20) =1a(21) =56197a(22) =18089a(23) =1861a(24) =193a(25) =25a(26) =5a(27) =1a(28) =1463670a(29) =398959