Nearest integer to Bernoulli(2n)/(-4n).

Terms

a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =0a(8) =-2a(9) =13a(10) =-141a(11) =1804a(12) =-27414a(13) =487468a(14) =-10026348a(15) =236192434a(16) =-6317862398a(17) =190439655626