A137118

Numbers k such that k and k^2 use only the digits 2, 6, 7, 8 and 9.

26, 27, 277, 826, 887, 2826, 8826, 8887, 9286, 27886, 29626, 29777, 79286, 88277, 269777, 277267, 286827, 298826, 299827, 792267, 828667, 829626, 989277, 989286, 989887, 2772667, 2772886, 2792667, 2877886, 2962767, 2982767, 7922687, 8227267, 8299277, 8768676, 8829886, 8872867, 9629626, 9898626, 9989886, 26267826, 27689886, 27926667

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