Numbers n such that n = pi(n) + phi(n), where pi = A000720, phi = A000010.

Terms

a(0) =1a(1) =2a(2) =4a(3) =8a(4) =27a(5) =35a(6) =215a(7) =235a(8) =2611a(9) =65113a(10) =174647a(11) =1301317a(12) =1302509a(13) =5021647a(14) =10885081a(15) =36319939a(16) =70112131a(17) =70113559a(18) =325575773a(19) =514258883a(20) =742327529a(21) =1069238453a(22) =18721771909a(23) =27788563039a(24) =113350570453a(25) =835005036247