a(n) = n^4*Product_{distinct primes p dividing n} (1+1/p^4).

Terms

a(0) =1a(1) =17a(2) =82a(3) =272a(4) =626a(5) =1394a(6) =2402a(7) =4352a(8) =6642a(9) =10642a(10) =14642a(11) =22304a(12) =28562a(13) =40834a(14) =51332a(15) =69632a(16) =83522a(17) =112914a(18) =130322a(19) =170272a(20) =196964a(21) =248914a(22) =279842a(23) =356864a(24) =391250a(25) =485554a(26) =538002a(27) =653344a(28) =707282a(29) =872644