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Search: id:A109645
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| A109645 |
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Primes whose decimal expansion has the form ij, where i and j are integers with j < i. |
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+0
1
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| 31, 41, 43, 53, 61, 71, 73, 83, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 1511, 163, 167, 1613, 173, 179, 181, 1811, 191, 193, 197, 199, 1913, 2011, 2017, 211, 2111, 2113, 223, 227, 229, 2213, 2221, 233, 239, 2311, 241, 2411, 2417, 2423
(list; graph; listen)
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OFFSET
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1,1
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LINKS
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R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 21 2008, Table of n, a(n) for n = 1..126
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EXAMPLE
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Primes pertaining to i=19 are 191,193,197,199,1913. (1911, 1915, 1917, etc.are composite)
For i=1 and 2 there are no such primes.
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CROSSREFS
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Adjacent sequences: A109642 A109643 A109644 this_sequence A109646 A109647 A109648
Sequence in context: A039378 A043201 A043981 this_sequence A099180 A103490 A105320
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KEYWORD
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base,nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 04 2005
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EXTENSIONS
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More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 21 2008
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