Numerator of Bernoulli(n, 2/5).

Terms

a(0) =1a(1) =-1a(2) =-11a(3) =3a(4) =91a(5) =-43a(6) =-12347a(7) =1183a(8) =62851a(9) =-54423a(10) =-39448591a(11) =3799763a(12) =27287144401a(13) =-375591203a(14) =-34562009741a(15) =49954996743