Numbers k such that sigma(k) - phi(k) is a brilliant number (A078972).

Terms

a(0) =6a(1) =10a(2) =49a(3) =242a(4) =289a(5) =512a(6) =578a(7) =800a(8) =900a(9) =1250a(10) =2048a(11) =5041a(12) =15625a(13) =17424a(14) =22201a(15) =22472a(16) =26450a(17) =28900a(18) =48400a(19) =60025a(20) =62001a(21) =65536a(22) =69169a(23) =91592a(24) =131072a(25) =144722a(26) =146689a(27) =151321a(28) =160801a(29) =201601