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A110433
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a(1) = 1 then the least multiple of odd numbers not odd mutiples of 5, (3,7,9,11,13,17,19,21,23,27,29,...) such that every partial concatenation is non-composite.
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1, 3, 7, 63, 77, 39, 357, 57, 21, 1909, 567, 1827, 713, 1353, 21349, 273, 533, 43, 4559, 7497, 1989, 1749, 5529, 49029, 7747, 3843, 1943, 1449, 13987, 24893, 11319, 50007, 2673, 14691, 23577, 147117, 28119, 11439, 57909, 7821, 3939, 41097, 2889, 78807
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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COMMENTS
| Pseudoprimality, but not primality, checked for some of the larger numbers involved here. - Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), May 11 2006
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EXAMPLE
| 13,137,13763,1376377 are all prime where 63 is a multiple of 9 and 77 is a multiple of 11.
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CROSSREFS
| Sequence in context: A183174 A077703 A134705 * A041817 A120364 A088797
Adjacent sequences: A110430 A110431 A110432 * A110434 A110435 A110436
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KEYWORD
| base,easy,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 02 2005
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EXTENSIONS
| More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), May 11 2006
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