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Search: id:A102648
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| A102648 |
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a(n) is the number of primes p between 0 and 99 such that 100*n+p is also prime. |
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+0
1
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| 9, 6, 15, 6, 5, 13, 5, 6, 12, 5, 6, 11, 6, 8, 11, 6, 7, 10, 6, 7, 10, 8, 6, 9, 4, 6, 11, 7, 4, 10, 3, 6, 13, 4, 8, 11, 5, 5, 11, 6, 4, 15, 3, 4, 10, 5, 6, 6, 7, 4, 10, 6, 3, 11, 5, 7, 7, 7, 3, 11, 5, 6, 14, 1, 4, 9, 5, 6, 10, 4, 3, 11, 2, 4, 12, 4, 7, 9, 3, 5, 8, 6, 5, 8, 5, 5, 11, 7, 4, 8, 4, 3
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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a(n) <= 20
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EXAMPLE
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a(2)=6 because 11,211,23,223,29,229,41,241,71,271,83,283 are primes.
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CROSSREFS
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Sequence in context: A070164 A063602 A166520 this_sequence A040074 A088999 A073782
Adjacent sequences: A102645 A102646 A102647 this_sequence A102649 A102650 A102651
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KEYWORD
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nonn,easy
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AUTHOR
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Bill R McEachen (bmceache(AT)centralsan.dst.ca.us), Feb 03 2005
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EXTENSIONS
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Edited by Don Reble (djr(AT)nk.ca), Mar 28 2006
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