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

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =626a(5) =1a(6) =1a(7) =1a(8) =6562a(9) =626a(10) =1a(11) =1a(12) =28562a(13) =1a(14) =626a(15) =1a(16) =83522a(17) =6562a(18) =1a(19) =626a(20) =194482a(21) =1a(22) =1a(23) =1a(24) =391251a(25) =28562a(26) =6562a(27) =1a(28) =707282a(29) =626