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Search: id:A088629
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| A088629 |
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Smallest number k not included earlier such that the concatenation n, k is a prime. |
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+0
2
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| 1, 3, 7, 19, 9, 13, 27, 11, 29, 21, 17, 23, 61, 33, 31, 37, 41, 47, 49, 39, 43, 51, 57, 59, 79, 63, 53, 87, 69, 67, 81, 71, 73, 91, 83, 77, 93, 89, 103, 99, 113, 97, 117, 101, 119, 133, 111, 109, 121, 123, 131, 127, 129, 139, 147, 149, 107, 151, 141, 161, 153, 137, 179
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Another rearrangement of odd numbers not == 0 mod 5.
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EXAMPLE
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a(4) = 19. Though 41, 43 and 47 are prime 1, 3, and 7 have been included earlier and also 49, 411, 413, and 417 are not prime hence 419 is the required prime.
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CROSSREFS
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Cf. A088630.
Sequence in context: A110578 A134045 A079898 this_sequence A075609 A083439 A032675
Adjacent sequences: A088626 A088627 A088628 this_sequence A088630 A088631 A088632
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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), Oct 21 2003
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EXTENSIONS
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More terms from Ray G. Opao (1260(AT)email.com), Aug 19 2004
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