Triangle read by rows: expansion of (1 + 3*x^2)/(1 - x*(2*y-x)).

Terms

a(0) =1a(1) =0a(2) =2a(3) =2a(4) =0a(5) =4a(6) =0a(7) =2a(8) =0a(9) =8a(10) =-2a(11) =0a(12) =0a(13) =16a(14) =0a(15) =6a(16) =0a(17) =-8a(18) =0a(19) =32a(20) =2a(21) =0a(22) =-12a(23) =0a(24) =-32a(25) =64a(26) =0a(27) =10a(28) =0a(29) =-16