Numbers k such that phi(k) mod core(k) = 1 where core(k) is the squarefree part of k.

Terms

a(0) =2a(1) =12a(2) =48a(3) =60a(4) =63a(5) =75a(6) =175a(7) =192a(8) =363a(9) =405a(10) =468a(11) =704a(12) =768a(13) =816a(14) =867a(15) =891a(16) =960a(17) =980a(18) =1008a(19) =1020a(20) =1587a(21) =1875a(22) =2023a(23) =2107a(24) =2331a(25) =2475a(26) =2523a(27) =2527a(28) =2800a(29) =2835