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A119143
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Numbers n such that the n-th triangular number contains only digits {1,6,8}.
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2
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1, 3, 11, 36, 41, 483, 1541, 4041, 36908, 127958, 603136, 1110753, 1795333, 3518005633, 4046896633, 11055868678, 37045070336, 47289885136, 11563893709446, 193226234301588, 194000856277036, 351621434534041
(list; graph; refs; listen; history; internal format)
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