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A119142
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Triangular numbers composed of digits {1,6,8}.
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2
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1, 6, 66, 666, 861, 116886, 1188111, 8166861, 681118686, 8186688861, 181886818816, 616886668881, 1611611188111, 6188181818668868161, 8188686181116816661, 61116116118118668181, 686168618118116111616
(list; graph; refs; listen; history; internal format)
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