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A032747
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Super-7 Numbers (7 x n^7 contains substring '7777777' in its decimal expansion).
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1
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140997, 490996, 1184321, 1259609, 1409970, 1783166, 1886654, 1977538, 2457756, 2714763, 2750425, 2980991, 3043607, 3283057, 3689639, 4191601, 4258476, 4642725, 4909960, 4973029, 5242829, 5349973, 5444788, 5523544, 5682065
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,1
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REFERENCES
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C. A. Pickover, "Keys to Infinity", New York: Wiley, p. 7, 1995.
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LINKS
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Table of n, a(n) for n=0..24.
Eric Weisstein's World of Mathematics, Super-d Number.
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MATHEMATICA
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Select[Range[6*10^6], MemberQ[Partition[IntegerDigits[7#^7], 7, 1], {7, 7, 7, 7, 7, 7, 7}]&] (* Harvey P. Dale, Sep 01 2014 *)
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CROSSREFS
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Cf. A014569.
Sequence in context: A250570 A252017 A203833 * A212373 A195438 A164527
Adjacent sequences: A032744 A032745 A032746 * A032748 A032749 A032750
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KEYWORD
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nonn,base
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AUTHOR
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Patrick De Geest, May 15 1998
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STATUS
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approved
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