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

Terms

a(0) =1a(1) =32a(2) =242a(3) =1024a(4) =3126a(5) =7744a(6) =16806a(7) =32768a(8) =58807a(9) =100032a(10) =161050a(11) =247808a(12) =371294a(13) =537792a(14) =756492a(15) =1048576a(16) =1419858a(17) =1881824a(18) =2476098a(19) =3201024a(20) =4067052a(21) =5153600a(22) =6436342a(23) =7929856a(24) =9768751a(25) =11881408a(26) =14290100a(27) =17209344a(28) =20511150a(29) =24207744