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Search: id:A130694
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| A130694 |
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Powers of 2 that contain all ten digits. |
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+0
2
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| 68, 70, 79, 82, 84, 87, 88, 89, 94, 95, 96, 97, 98, 100, 101, 103, 104, 105, 106, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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It is believed that every power of 2 beyond 2^86 contains the digit 0.
A043537(A000079(a(n))) = 10. - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 29 2007
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EXAMPLE
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2^68 = 295147905179352825856.
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MATHEMATICA
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A2 := {}; Do[If[Length[Union[ IntegerDigits[2^ n]]] == 10, A2 = Join[A2, {n}]], {n, 1, 200}]; Print[A2]
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CROSSREFS
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Cf. A007377, A000079.
Adjacent sequences: A130691 A130692 A130693 this_sequence A130695 A130696 A130697
Sequence in context: A043862 A043871 A058906 this_sequence A058980 A079703 A097760
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KEYWORD
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hard,nonn,base
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AUTHOR
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Greg Dresden (dresdeng(AT)wlu.edu), Jul 10 2007
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