Eighth convolution of A115140.

Terms

a(0) =1a(1) =-8a(2) =20a(3) =-16a(4) =2a(5) =0a(6) =0a(7) =0a(8) =-1a(9) =-8a(10) =-44a(11) =-208a(12) =-910a(13) =-3808a(14) =-15504a(15) =-62016a(16) =-245157a(17) =-961400a(18) =-3749460a(19) =-14567280a(20) =-56448210a(21) =-218349120a(22) =-843621600a(23) =-3257112960a(24) =-12570420330a(25) =-48507033744a(26) =-187187399448a(27) =-722477682080