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A119071
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Triangular numbers composed of digits {0,4,5}.
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2
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45, 55, 4005, 5050, 404550, 405450, 500500, 40405555, 40504500, 50005000, 454044045, 500054500, 4050045000, 4540044405, 5000050000, 405000450000, 455005054540, 500000500000, 40500004500000, 50000005000000
(list; graph; refs; listen; history; internal format)
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