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Search: id:A110434
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| A110434 |
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Distinct numbers with least significant digit following the repetitive pattern 1,3,7,9,1,3,7,9,... such that every partial concatenation is a prime. |
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+0
1
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| 11, 3, 17, 49, 51, 93, 87, 269, 151, 183, 167, 79, 371, 273, 217, 329, 31, 443, 187, 1049, 271, 213, 587, 969, 181, 873, 1187, 429, 411, 253, 557, 99, 1351, 323, 3627, 469, 2951, 813, 697, 459, 2061, 603, 77, 489, 1251, 1443, 297, 2079, 561, 753, 507, 1959, 1041
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Conjecture: every number == 1,3,7,9 (mod 10) is a term.
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
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11,113,11317,1131749,... etc. are all prime.
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CROSSREFS
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Sequence in context: A075023 A088262 A110406 this_sequence A110798 A088653 A107598
Adjacent sequences: A110431 A110432 A110433 this_sequence A110435 A110436 A110437
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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 02 2005
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EXTENSIONS
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More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), May 11 2006
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