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A089346
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Primes of the form identical odd digits followed by a 1.
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8
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11, 31, 71, 331, 991, 3331, 33331, 99991, 333331, 3333331, 9999991, 33333331, 555555555551, 5555555555551, 7777777777771, 333333333333333331, 1111111111111111111, 77777777777777777771, 11111111111111111111111
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 1..44
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MATHEMATICA
| Select[FromDigits/@Flatten[Table[Join[PadLeft[{n}, i, n], {1}], {i, 25}, {n, 1, 9, 2}], 1], PrimeQ] (* From Harvey P. Dale, Jul 25 2011 *)
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CROSSREFS
| Cf. A089345, A089347.
Sequence in context: A139634 A173803 A124704 * A038773 A054757 A038768
Adjacent sequences: A089343 A089344 A089345 * A089347 A089348 A089349
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KEYWORD
| base,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 05 2003
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EXTENSIONS
| More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 07 2003
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