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Search: id:A083815
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| A083815 |
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Semiprimes whose prime factors are distinct and the reversal of one factor is equal to the other. |
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+0
1
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| 403, 1207, 2701, 7663, 35143, 75007, 117907, 127087, 140209, 173809, 197209, 247021, 257821, 342127, 382387, 643063, 692443, 743623, 1226221, 1341331, 1626151, 1698661, 1739161, 2073991, 2138791, 2528611, 2561011, 3321133
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Products of emirp pairs, sorted. - Lekraj Beedassy (blekraj(AT)yahoo.com), Jan 10 2008
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EXAMPLE
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a(2)= 1207 = 17 * 71.
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CROSSREFS
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Cf. A001358.
Cf. A109308.
Adjacent sequences: A083812 A083813 A083814 this_sequence A083816 A083817 A083818
Sequence in context: A104391 A128767 A097740 this_sequence A097741 A117836 A135791
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KEYWORD
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base,nonn
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AUTHOR
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Jason Earls (zevi_35711(AT)yahoo.com), Jun 17 2003
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EXTENSIONS
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More terms from Ray Chandler (rayjchandler(AT)sbcglobal.net), Jul 22 2003
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