Numbers k such that k and k^2 use only the digits 2, 3, 5, 6 and 8.

Terms

a(0) =5a(1) =6a(2) =25a(3) =235a(4) =256a(5) =535a(6) =2385a(7) =2585a(8) =2885a(9) =5325a(10) =23566a(11) =23585a(12) =56865a(13) =62335a(14) =228656a(15) =235335a(16) =235635a(17) =256585a(18) =288656a(19) =535335a(20) =623585a(21) =828665a(22) =2286665a(23) =2353365a(24) =2362885a(25) =2363335a(26) =2363385a(27) =2523566a(28) =2526335a(29) =2556635