A triangle related to the GF(z) formulas of the rows of the ED2 array A167560.

Terms

a(0) =1a(1) =0a(2) =2a(3) =2a(4) =-2a(5) =6a(6) =0a(7) =16a(8) =-16a(9) =24a(10) =24a(11) =-48a(12) =144a(13) =-120a(14) =120a(15) =0a(16) =432a(17) =-864a(18) =1392a(19) =-960a(20) =720a(21) =720a(22) =-2160a(23) =8208a(24) =-12816a(25) =14448a(26) =-8400a(27) =5040a(28) =0a(29) =23040