Numerator of sum of -4th powers of divisors of n.

Terms

a(0) =1a(1) =17a(2) =82a(3) =273a(4) =626a(5) =697a(6) =2402a(7) =4369a(8) =6643a(9) =5321a(10) =14642a(11) =3731a(12) =28562a(13) =20417a(14) =51332a(15) =69905a(16) =83522a(17) =112931a(18) =130322a(19) =85449a(20) =196964a(21) =124457a(22) =279842a(23) =179129a(24) =391251a(25) =242777a(26) =538084a(27) =46839a(28) =707282a(29) =218161