Numerator of Bernoulli(n, -1/4).

Terms

a(0) =1a(1) =-3a(2) =23a(3) =-15a(4) =247a(5) =5a(6) =473a(7) =-455a(8) =607a(9) =12429a(10) =-1235a(11) =-555775a(12) =1479997a(13) =35135893a(14) =-57169a(15) =-2990414775a(16) =118534559a(17) =329655706397a(18) =-5749662829a(20) =91546290557