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A124290
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Largest prime < 10*a(n-1), a(1)=11.
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1
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11, 109, 1087, 10867, 108649, 1086469, 10864669, 108646667, 1086466657, 10864666531, 108646665307, 1086466653067, 10864666530661, 108646665306581, 1086466653065803, 10864666530658001, 108646665306579997
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OFFSET
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1,1
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LINKS
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MATHEMATICA
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NestList[NextPrime[10#, -1]&, 11, 20] (* Harvey P. Dale, Mar 09 2011 *)
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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