Nearest integer to Bernoulli number B_{2n}.

Terms

a(0) =1a(1) =0a(2) =0a(3) =0a(4) =0a(5) =0a(6) =0a(7) =1a(8) =-7a(9) =55a(10) =-529a(11) =6192a(12) =-86580a(13) =1425517a(14) =-27298231a(15) =601580874a(16) =-15116315767a(17) =429614643061