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A099663
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a[n] is the largest prime before A002276[n] repdigits.
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0
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19, 211, 2221, 22193, 222199, 2222219, 22222199, 222222193, 2222222137, 22222222189, 222222222169, 2222222222197, 22222222222201, 222222222222151, 2222222222222203, 22222222222222153, 222222222222222221
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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EXAMPLE
| n=2: 19 is before 22.
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MATHEMATICA
| <<NumberTheory`NumberTheoryFunctions` Table[Table[PreviousPrime[ *2(10^n-1)/9], {n, 2, 35}]
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CROSSREFS
| Cf. A003618, A003617, A096497, A096498, A068104, A002275-A002283, A099656-A099669.
Sequence in context: A032613 A199132 A201791 * A202665 A115854 A009474
Adjacent sequences: A099660 A099661 A099662 * A099664 A099665 A099666
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KEYWORD
| base,nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Nov 17 2004
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