Second diagonal of triangle in A059370.

Terms

a(0) =1a(1) =-4a(2) =8a(3) =-16a(4) =12a(5) =-96a(6) =-480a(7) =-4672a(8) =-45520a(9) =-493120a(10) =-5798912a(11) =-73668608a(12) =-1005335552a(13) =-14671085568a(14) =-228051746304