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A131550
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Least power of 3 having exactly n consecutive 3's in its decimal representation.
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1
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OFFSET
| 1,2
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EXAMPLE
| a(3)=119 because 3^119(i.e. 599003433304810403471059943169868346577158542512617035467) is the smallest power of 3 to contain a run of 3 consecutive threes in its decimal form.
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MATHEMATICA
| a = ""; Do[ a = StringJoin[a, "3"]; b = StringJoin[a, "3"]; k = 1; While[ StringPosition[ ToString[3^k], a] == {} || StringPosition[ ToString[3^k], b] != {}, k++ ]; Print[k], {n, 1, 10} ]
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CROSSREFS
| Sequence in context: A142228 A204735 A010019 * A158558 A160893 A202994
Adjacent sequences: A131547 A131548 A131549 * A131551 A131552 A131553
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KEYWORD
| more,nonn,base
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AUTHOR
| Shyam Sunder Gupta (guptass(AT)rediffmail.com), Aug 26 2007
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