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A099667
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a[n] is the largest prime before A002281[n] repdigits.
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1
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5, 73, 773, 7759, 77773, 777769, 7777769, 77777761, 777777773, 7777777741, 77777777767, 777777777773, 7777777777771, 77777777777753, 777777777777773, 7777777777777753, 77777777777777747, 777777777777777743
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history;
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internal format)
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OFFSET
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1,1
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LINKS
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Table of n, a(n) for n=1..18.
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EXAMPLE
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n=2: 73 is before 77.
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MATHEMATICA
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<<NumberTheory`NumberTheoryFunctions` Table[Table[PreviousPrime[7*(10^n-1)/9], {n, 1, 35}]
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CROSSREFS
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Cf. A003618, A003617, A096497, A096498, A068104, A002275-A002283, A099656-A099668.
Sequence in context: A070526 A070530 A059017 * A108444 A155662 A182328
Adjacent sequences: A099664 A099665 A099666 * A099668 A099669 A099670
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KEYWORD
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base,nonn
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AUTHOR
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Labos E. (labos(AT)ana.sote.hu), Nov 17 2004
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STATUS
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approved
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