Numbers k such that k and k^2 use only the digits 3, 4, 5, 7 and 8.

Terms

a(0) =88a(1) =588a(2) =888a(3) =7378a(4) =7588a(5) =8588a(6) =74388a(7) =88588a(8) =738538a(9) =743878a(10) =745478a(11) =747378a(12) =758588a(13) =5878388a(14) =7338588a(15) =7448878a(16) =7573538a(17) =8878878a(18) =57843538a(19) =73385888a(20) =73877438a(21) =73883588a(22) =75745478a(23) =75784878a(24) =88534388a(25) =578573538a(26) =733878388a(27) =757544438a(28) =7384753588a(29) =7575344438