Irregular triangle read by rows: T(n,k) = A344031(n,k)/2, n >= 1, 0 <= k <= 2*n-2.

Terms

a(0) =1a(1) =2a(2) =0a(3) =-3a(4) =4a(5) =-6a(6) =-18a(7) =0a(8) =18a(9) =2a(10) =-48a(11) =-72a(12) =126a(13) =198a(14) =0a(15) =-162a(16) =-44a(17) =-240a(18) =210a(19) =1620a(20) =1260a(21) =-2484a(22) =-2700a(23) =0a(24) =1944a(25) =-328a(26) =-60a(27) =5940a(28) =11880a(29) =-13050