Composite numbers n such that n'=(n+8)', where n' is the arithmetic derivative of n.

Terms

a(0) =132a(1) =476a(2) =2108a(3) =16748a(4) =27548a(5) =28676a(6) =99524a(7) =100076a(8) =239948a(9) =308228a(10) =344129a(11) =573476a(12) =601676a(13) =822908a(14) =860276a(15) =883268a(16) =1673228a(17) =3274010a(18) =4959476a(19) =7548956a(20) =8916044a(21) =9048428a(22) =9215348a(23) =9643169a(24) =9833588a(25) =10011908a(26) =14773676a(27) =17119436a(28) =18529964a(29) =19459028