Composite numbers k such that phi(k) = phi(k-1) + phi(k-2).

Terms

a(0) =1037a(1) =1541a(2) =6527a(3) =9179a(4) =55387a(5) =61133a(6) =72581a(7) =110177a(8) =152651a(9) =179297a(10) =244967a(11) =299651a(12) =603461a(13) =619697a(14) =1876727a(15) =2841917a(16) =3058211a(17) =3971321a(18) =4110653a(19) =4316441a(20) =4397317a(21) =6008861a(22) =10076627a(23) =10667801a(24) =10835441a(25) =11561597a(26) =24571871a(27) =36521777a(28) =45981377