Numbers n such that phi(n) = sigma(n) - sigma(n+1).

Terms

a(0) =170a(1) =518a(2) =15416a(3) =16472a(4) =21584a(5) =52744a(6) =140864a(7) =187736a(8) =196318a(9) =318626a(10) =354118a(11) =639286a(12) =828814a(13) =942326a(14) =1333172a(15) =1604018a(16) =3301024a(17) =5240458a(18) =6490678a(19) =7552264a(20) =8040166a(21) =8321326a(22) =9790430a(23) =12237950a(24) =12461834a(25) =14818438a(26) =19012455a(27) =20392318a(28) =22625158a(29) =29201984