Dirichlet g.f.: zeta(s-3)^2 * (1 - 2^(4-s)) / zeta(s).

Terms

a(0) =1a(1) =-1a(2) =53a(3) =-64a(4) =249a(5) =-53a(6) =685a(7) =-960a(8) =2133a(9) =-249a(10) =2661a(11) =-3392a(12) =4393a(13) =-685a(14) =13197a(15) =-11264a(16) =9825a(17) =-2133a(18) =13717a(19) =-15936a(20) =36305a(21) =-2661a(22) =24333a(23) =-50880a(24) =46625a(25) =-4393a(26) =76545a(27) =-43840a(28) =48777a(29) =-13197