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Search: id:A031146
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| A031146 |
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Least power of 2 having just n zeros in its decimal representation. |
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+0
5
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| 0, 10, 42, 43, 79, 88, 100, 102, 189, 198, 242, 250, 252, 263, 305, 262, 370, 306, 368, 383, 447, 464, 496, 672, 466, 557, 630, 629, 628, 654, 657, 746, 771, 798, 908, 913, 917, 906, 905, 1012, 1113, 988, 1020, 989, 1044, 1114, 1120, 1118, 1221, 1218, 1255
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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a(3)=43 since 2^m contains 3 0's for m starting with 43 (2^43=8796093022208), and followed by 53,61,69,70,83,87,89,90,93,...
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MATHEMATICA
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a = {}; Do[k = 1; While[ Count[ IntegerDigits[2^k], 0] != n, k++ ]; a = Append[a, k], {n, 0, 50} ]; a (Robert G. Wilson v)
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CROSSREFS
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Cf. A000079, A007377, A031147.
Sequence in context: A113683 A060994 A086544 this_sequence A108678 A027171 A003822
Adjacent sequences: A031143 A031144 A031145 this_sequence A031147 A031148 A031149
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KEYWORD
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base,nonn
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AUTHOR
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njas
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EXTENSIONS
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More terms from Erich Friedman (erich.friedman(AT)stetson.edu).
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