Numerator of Bernoulli(n, 2/9).

Terms

a(0) =1a(1) =-5a(2) =-1a(3) =35a(4) =-227a(5) =-1435a(6) =27599a(7) =123095a(8) =-2428187a(9) =-18154423a(10) =1002748195a(11) =4095412475