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Search: id:A105992
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| 101, 113, 131, 151, 181, 191, 211, 311, 811, 911, 1117, 1151, 1171, 1181, 1511, 1811, 2111, 4111, 8111, 10111, 11113, 11117, 11119, 11131, 11161, 11171, 11311, 11411, 16111, 101111, 111119, 111121, 111191, 111211, 111611, 112111, 113111, 131111
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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C. Caldwell and H. Dubner, "The near repunit primes 1(n-k-1)01(1k)," J. Recreational Math., 27 (1995) 35-41.
Heleen, J. P., "More near-repunit primes 1(n-k-1)D(1)1(k), D=2,3, ..., 9," J. Recreational Math., 29:3 (1998) 190-195.
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LINKS
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Chris Caldwell, The Top 20 Near-repdigit Primes.
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EXAMPLE
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a(2)=113 is a term because 113 is a prime and all digits are 1 except one.
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CROSSREFS
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Cf. A000042, A002275, A004022, A046053, A046413, A065074, A065080, A065083, A102782, A118505.
Adjacent sequences: A105989 A105990 A105991 this_sequence A105993 A105994 A105995
Sequence in context: A084413 A069691 A084414 this_sequence A038370 A084430 A046075
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KEYWORD
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base,nonn
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AUTHOR
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Shyam Sunder Gupta (guptass(AT)rediffmail.com), Apr 29 2005
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