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Search: id:A069620
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| A069620 |
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a(1) = 8; a(2n) = smallest prime that is a right concatenation of a(2n-1) and a number with no insignificant zeros and a(2n+1) = smallest prime ending in ( the least significant digits) a(2n-1). Alternate left and right concatenation yielding primes. |
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+0
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| 8, 83, 283, 2833, 32833, 328331, 2328331, 232833127, 3232833127, 323283312749, 14323283312749, 1432328331274927, 281432328331274927, 28143232833127492741, 3628143232833127492741, 36281432328331274927411
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(4) = 2833 staring with a(3) =283 and a(5) = 32833 ending in a(4) = 2833.
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CROSSREFS
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Cf. A053582, A069605, A069606, A069607, A069608, A069609, A069610, A069611, A069613, A069614, A069615, A069616, A069617, A069618, A069619.
Adjacent sequences: A069617 A069618 A069619 this_sequence A069621 A069622 A069623
Sequence in context: A073699 A068173 A069635 this_sequence A039939 A143868 A130591
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 27 2002
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EXTENSIONS
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More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Mar 30 2003
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