a(n) = n^5 * Product_{p|n, p prime} (1 + 1/p^5).

Terms

a(0) =1a(1) =33a(2) =244a(3) =1056a(4) =3126a(5) =8052a(6) =16808a(7) =33792a(8) =59292a(9) =103158a(10) =161052a(11) =257664a(12) =371294a(13) =554664a(14) =762744a(15) =1081344a(16) =1419858a(17) =1956636a(18) =2476100a(19) =3301056a(20) =4101152a(21) =5314716a(22) =6436344a(23) =8245248a(24) =9768750a(25) =12252702a(26) =14407956a(27) =17749248a(28) =20511150a(29) =25170552