Numerator of Bernoulli number B_n.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =0a(4) =-1a(5) =0a(6) =1a(7) =0a(8) =-1a(9) =0a(10) =5a(11) =0a(12) =-691a(13) =0a(14) =7a(15) =0a(16) =-3617a(17) =0a(18) =43867a(19) =0a(20) =-174611a(21) =0a(22) =854513a(23) =0a(24) =-236364091a(25) =0a(26) =8553103a(27) =0a(28) =-23749461029a(29) =0