a(0) = 1, a(n) = 480*sigma(n).

Terms

a(0) =1a(1) =480a(2) =1440a(3) =1920a(4) =3360a(5) =2880a(6) =5760a(7) =3840a(8) =7200a(9) =6240a(10) =8640a(11) =5760a(12) =13440a(13) =6720a(14) =11520a(15) =11520a(16) =14880a(17) =8640a(18) =18720a(19) =9600a(20) =20160a(21) =15360a(22) =17280a(23) =11520a(24) =28800a(25) =14880a(26) =20160a(27) =19200a(28) =26880a(29) =14400