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Search: id:A063540
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| A063540 |
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Smallest power of 2 having just n 6's in its decimal representation. |
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+0
1
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| 1, 4, 16, 36, 60, 100, 72, 123, 124, 161, 157, 243, 196, 230, 222, 220, 300, 323, 361, 447, 378, 551, 433, 506, 555, 565, 636, 508, 606, 662, 701, 778, 810, 746, 823, 839, 850, 977, 1074, 861, 1046, 1086, 996, 1161, 1067, 1168, 1083, 983, 1223, 1252, 1303
(list; graph; listen)
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OFFSET
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0,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=0,...,150
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MATHEMATICA
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a = {}; Do[k = 1; While[ Count[ IntegerDigits[2^k], 6] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a
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PROGRAM
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(PARI) Count(x, d)= { local(c, f); c=0; while (x>9, f=x-10*(x\10); if (f==d, c++); x\=10); if (x==d, c++); return(c) } { for (n=0, 150, a=1; while (Count(2^a, 6) != n, a++); write("b063540.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Aug 25 2009]
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CROSSREFS
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Sequence in context: A104125 A014727 A044065 this_sequence A055808 A016742 A121317
Adjacent sequences: A063537 A063538 A063539 this_sequence A063541 A063542 A063543
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KEYWORD
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base,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 10 2001
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