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A048372
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a(n)^3 is smallest cube containing exactly n 7's.
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10
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3, 26, 83, 173, 1983, 2953, 19753, 90643, 258999, 426859, 4255753, 13955253, 42111153, 92356426, 425851173, 878398753, 9197190176, 9196397753, 89494606688, 390974932563, 918856391641, 4250703842293
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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a[n_] := Module[{i = 0}, While[DigitCount[i^3][[7]] != n, i++ ]; i]; (* Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 27 2006 *)
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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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a(14) from Sam Handler (sam_5_5_5_0(AT)yahoo.com), Aug 27 2006
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STATUS
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approved
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