Numbers k such that phi(k) is a harmonic number.

Terms

a(0) =1a(1) =2a(2) =7a(3) =9a(4) =14a(5) =18a(6) =29a(7) =58a(8) =213a(9) =271a(10) =284a(11) =426a(12) =542a(13) =673a(14) =731a(15) =791a(16) =833a(17) =1011a(18) =1015a(19) =1017a(20) =1131a(21) =1305a(22) =1346a(23) =1348a(24) =1376a(25) =1462a(26) =1508a(27) =1568a(28) =1582a(29) =1624