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Search: id:A158191
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| A158191 |
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Attach the smallest prime to the end of the string a(n-1) so a(n) is also prime |
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+0
1
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| 2, 23, 233, 2333, 23333, 2333323, 23333237, 233332373, 23333237353, 2333323735319, 2333323735319149, 2333323735319149571, 23333237353191495713, 23333237353191495713131, 233332373531914957131313
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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a(6)=2333323 since a(5)=23333 (prime) and 233333, 233335, 233337, 2333311, 2333313, 2333317 and 2333319 are all composite
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CROSSREFS
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Cf. A048549, A088603, A089703, A065712, A100893
Sequence in context: A127889 A088603 A048549 this_sequence A089703 A088094 A112782
Adjacent sequences: A158188 A158189 A158190 this_sequence A158192 A158193 A158194
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KEYWORD
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nonn,new
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AUTHOR
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Sergio Pimentel (ferdiego(AT)suddenlink.net), Mar 13 2009
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EXTENSIONS
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More terms from Sean A. Irvine (sairvin(AT)xtra.co.nz), Nov 29 2009
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