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A119219
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Numbers k such that the k-th triangular number contains only digits {5,6,7}.
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3
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3, 10, 11, 36, 105, 114, 3363, 3369, 3648, 10636, 1073010, 1164274, 33336636, 33336696, 107290789, 1063736505, 3887841963, 3333333366663363
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OFFSET
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1,1
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COMMENTS
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Next term exceeds 1.4*10^16.
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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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STATUS
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approved
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