Numerator of Bernoulli(n, 4/9).

Terms

a(0) =1a(1) =-1a(2) =-13a(3) =10a(4) =1813a(5) =-470a(6) =-161653a(7) =42070a(8) =13387093a(9) =-6278606a(10) =-5451121865a(11) =1420802350a(13) =-455069110262