Numerators of Bernoulli numbers B_2n.

Terms

a(0) =1a(1) =1a(2) =-1a(3) =1a(4) =-1a(5) =5a(6) =-691a(7) =7a(8) =-3617a(9) =43867a(10) =-174611a(11) =854513a(12) =-236364091a(13) =8553103a(14) =-23749461029