a(n)=A128056(n)/A128055(n).

Terms

a(0) =1a(1) =-3a(2) =-3a(3) =7a(4) =7a(5) =-9a(6) =-9a(7) =47a(8) =47a(9) =-123a(10) =-123a(11) =161a(12) =161a(13) =-843a(14) =-843a(15) =2207a(16) =2207a(17) =-2889a(18) =-2889a(19) =15127a(20) =15127a(21) =-39603a(22) =-39603a(23) =51841a(24) =51841a(25) =-271443a(26) =-271443a(27) =710647a(28) =710647a(29) =-930249