Smallest k such that d(phi(k)) - phi(d(k)) = n, where d(k) = A000005(k) and phi(k) = A000010(k).

Terms

a(0) =3a(1) =5a(2) =7a(3) =17a(4) =13a(5) =35a(6) =31a(7) =37a(8) =113a(9) =77a(10) =61a(11) =221a(12) =185a(13) =143a(14) =211a(15) =209a(16) =181a(17) =287a(18) =241a(19) =577a(20) =1729a(21) =403a(22) =421a(23) =1297a(24) =1057a(25) =1001a(26) =2113a(27) =779a(28) =1009a(29) =899