Numbers n such that n is the phi(n)-th nonprime number.

Terms

a(0) =1a(1) =4a(2) =8a(3) =27a(4) =35a(5) =215a(6) =235a(7) =2611a(8) =65113a(9) =174647a(10) =1301317a(11) =1302509a(12) =5021647a(13) =10885081a(14) =36319939a(15) =70112131a(16) =70113559a(17) =325575773a(18) =514258883a(19) =742327529a(20) =1069238453a(21) =18721771909a(22) =27788563039a(23) =113350570453a(24) =835005036247