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A119101
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Triangular numbers composed of digits {1,2,5}.
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2
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1, 15, 21, 55, 1225, 2211, 5151, 15225, 21115, 22155, 151525, 222111, 255255, 11551221, 12552555, 21115251, 22221111, 51151555, 111221155, 251115255, 2222211111, 2552515525, 111251152551, 122515222515, 222222111111
(list; graph; refs; listen; history; internal format)
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