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A119118
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Numbers k such that the k-th triangular number contains only digits {1,3,7}.
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2
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1, 2, 18, 58, 1853, 5853, 1620578, 485216058, 1243473981, 2747265466, 595277030253, 789599540493, 2573455929746, 48450258487106
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OFFSET
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1,2
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COMMENTS
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Next term is greater than 4.4*10^18. - Max Alekseyev, Oct 15 2012
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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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