Row sums of A337967.

Terms

a(0) =1a(1) =1a(2) =-2a(3) =-4a(4) =20a(5) =64a(6) =-488a(7) =-2176a(8) =22160a(9) =126976a(10) =-1616672a(11) =-11321344a(12) =172976960a(13) =1431568384a(14) =-25518205568a(15) =-243680935936