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A119120
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Numbers k such that the k-th triangular number contains only digits {1,3,8}.
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2
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1, 2, 421, 1541, 8753, 150421, 12914246, 1327696379533, 4034385661121, 605166395826533, 16360402306368458, 249752330575267378
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OFFSET
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1,2
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COMMENTS
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Next term exceeds 4.4*10^18.
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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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