Numbers k such that phi(k) + 9 | sigma(k).

Terms

a(0) =26a(1) =312a(2) =828a(3) =2475a(4) =2520a(5) =4950a(6) =7412a(7) =7942a(8) =10464a(9) =14454a(10) =30952a(11) =89262a(12) =1029632a(13) =3116544a(14) =17721152a(15) =56889152a(16) =538655552a(17) =804839424a(18) =9287924224a(19) =206150959104a(20) =698155922432