G.f. satisfies: A(x,y) = 1 + x*y*A(x,y+1)^2.

Terms

a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =2a(6) =0a(7) =9a(8) =14a(9) =5a(10) =0a(11) =64a(12) =124a(13) =74a(14) =14a(15) =0a(16) =624a(17) =1388a(18) =1074a(19) =352a(20) =42a(21) =0a(22) =7736a(23) =18964a(24) =17292a(25) =7520a(26) =1588a(27) =132a(28) =0a(29) =116416