a(n) = Sum_{d|n, d==1 mod 4} d^5 - Sum_{d|n, d==3 mod 4} d^5.

Terms

a(0) =1a(1) =1a(2) =-242a(3) =1a(4) =3126a(5) =-242a(6) =-16806a(7) =1a(8) =58807a(9) =3126a(10) =-161050a(11) =-242a(12) =371294a(13) =-16806a(14) =-756492a(15) =1a(16) =1419858a(17) =58807a(18) =-2476098a(19) =3126a(20) =4067052a(21) =-161050a(22) =-6436342a(23) =-242a(24) =9768751a(25) =371294a(26) =-14290100a(27) =-16806a(28) =20511150a(29) =-756492