Numbers k such that phi(k) + 5 | sigma(k).

Terms

a(0) =4a(1) =10a(2) =32a(3) =60a(4) =88a(5) =688a(6) =2544a(7) =3424a(8) =12200a(9) =62848a(10) =777984a(11) =1037824a(12) =16734208a(13) =67022848a(14) =8625555968a(15) =51537444864