Numbers k such that phi(k + 6) | sigma(k) + 6.

Terms

a(0) =10a(1) =20a(2) =26a(3) =58a(4) =122a(5) =1018a(6) =1040a(7) =2042a(8) =8186a(9) =32762a(10) =522752a(11) =2097146a(12) =8388602a(13) =9898496a(14) =16871744a(15) =33554426a(16) =1073741818a(17) =1630145024