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A115589
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Multiply first digit by k, append result to sequence; multiply second digit by k, append result to sequence; multiply third digit by k, append result to sequence; etc. a(1)=1, k=7 case.
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0
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1, 7, 49, 28, 63, 14, 56, 42, 21, 7, 28, 35, 42, 28, 14, 14, 7, 49, 14, 56, 21, 35, 28, 14, 14, 56, 7, 28, 7, 28, 49, 28, 63, 7, 28, 35, 42, 14, 7, 21, 35, 14, 56, 7, 28, 7, 28, 35, 42, 49, 14, 56, 49, 14, 56, 28, 63, 14, 56, 42, 21, 49, 14, 56, 21, 35, 28, 14, 7, 28, 49, 14, 7, 21
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OFFSET
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1,2
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COMMENTS
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All terms are evidently multiples of 7: 7, 14, ..., 63. Is the sequence periodic? Some repeating patterns are obvious, e.g., 63, 7, 28, 35, 42, but no cycle appears.
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LINKS
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MATHEMATICA
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ss=s={1}; Do[d=7s[[i]]; AppendTo[ss, d]; s=Flatten[{s, IntegerDigits[d]}], {i, 200}]; ss
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CROSSREFS
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KEYWORD
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nonn,base
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AUTHOR
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STATUS
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approved
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