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A136972
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Numbers n such that n and the square of n use only the digits 1, 2, 3, 4 and 9.
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1
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1, 2, 3, 11, 12, 21, 111, 139, 212, 339, 1111, 1193, 4943, 11132, 12212, 14139, 14943, 21193, 43923, 49229, 119132, 122193, 141111, 149139, 221911, 439229, 492239, 499423, 1192193, 1221193, 1393239, 2222911, 2234143, 3491911, 4911123, 4913443, 4929423, 4944132, 11132921, 11929423, 12214423, 14122143, 14912911, 14914132, 21194132
(list; graph; refs; listen; history; internal format)
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