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A119129
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Numbers k such that the k-th triangular number contains only digits {1,4,8}.
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2
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1, 478, 1541, 4866, 988113, 4216353, 15155321, 16977521, 983990258, 531956543121, 544826911685686, 16843306612090658, 127392946577229686
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OFFSET
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1,2
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COMMENTS
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Next term exceeds 1.4*10^20.
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LINKS
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CROSSREFS
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KEYWORD
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nonn,base,more
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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