Triangle read by rows, based on products of Jacobsthal numbers (A001045).

Terms

a(0) =1a(1) =-1a(2) =3a(3) =-2a(4) =-9a(5) =15a(6) =-4a(7) =-18a(8) =-25a(9) =55a(10) =-8a(11) =-36a(12) =-50a(13) =-121a(14) =231a(15) =-16a(16) =-72a(17) =-100a(18) =-242a(19) =-441a(20) =903a(21) =-32a(22) =-144a(23) =-200a(24) =-484a(25) =-882a(26) =-1849a(27) =3655a(28) =-64a(29) =-288