a(n) is the earliest number m such that n*pi(m)=phi(m).

Terms

a(0) =2a(1) =11a(2) =37a(3) =169a(4) =917a(5) =1087a(6) =15407a(7) =10379a(8) =30451a(9) =64591a(10) =187063a(11) =498419a(12) =1304707a(13) =3523969a(14) =9558541a(15) =26042629a(16) =73134517a(17) =189963073a(18) =528839387a(19) =1394194181a(20) =3779851321a(21) =10246935931a(22) =27800769133a(23) =75370121689