Sum_{d|n, d=1 mod 4} d^2.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =26a(5) =1a(6) =1a(7) =1a(8) =82a(9) =26a(10) =1a(11) =1a(12) =170a(13) =1a(14) =26a(15) =1a(16) =290a(17) =82a(18) =1a(19) =26a(20) =442a(21) =1a(22) =1a(23) =1a(24) =651a(25) =170a(26) =82a(27) =1a(28) =842a(29) =26