Shifted sequence of second differences of Genocchi numbers.

Terms

a(0) =0a(1) =-2a(2) =-2a(3) =6a(4) =14a(5) =-34a(6) =-138a(7) =310a(8) =1918a(9) =-4146a(10) =-36154a(11) =76454a(12) =891342a(13) =-1859138a(14) =-27891050a(15) =57641238a(16) =1080832286a(17) =-2219305810a(18) =-50833628826a(19) =103886563462