Numerator of Bernoulli(n, -2/9).

Terms

a(0) =1a(1) =-13a(2) =71a(3) =-143a(4) =2653a(5) =715a(6) =51791a(7) =-127127a(8) =-2336027a(9) =18133687a(10) =1003761955a(11) =-4095513851