Numbers k such that x = 2^k-2 satisfies phi(x)+2 = phi(x+2).

Terms

a(0) =3a(1) =4a(2) =6a(3) =8a(4) =14a(5) =18a(6) =20a(7) =32a(8) =62a(9) =90a(10) =108a(11) =128a(12) =522a(13) =608a(14) =1280a(15) =2204a(16) =2282a(17) =3218a(18) =4254a(19) =4424a(20) =9690a(21) =9942a(22) =11214a(23) =19938a(24) =21702a(25) =23210a(26) =44498a(27) =86244a(28) =110504a(29) =132050