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Search: id:A012884
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| A012884 |
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Numbers such that every prefix and suffix is 1 or a prime. |
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+0
6
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| 1, 2, 3, 5, 7, 11, 13, 17, 23, 31, 37, 53, 71, 73, 113, 131, 137, 173, 197, 311, 313, 317, 373, 797, 1373, 1997, 3137, 3797, 7331, 73331, 739397
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Intersection of A012883 and A143390. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Aug 13 2008]
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CROSSREFS
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Cf. A068669.
Sequence in context: A038617 A036962 A160337 this_sequence A068669 A100553 A152245
Adjacent sequences: A012881 A012882 A012883 this_sequence A012885 A012886 A012887
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KEYWORD
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nonn,fini,full,nice,base
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AUTHOR
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Larry Calmer (larry(AT)wri.com), Simon Plouffe (simon.plouffe(AT)gmail.com)
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EXTENSIONS
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Last term is 739397 (confirmed by David W. Wilson (davidwwilson(AT)comcast.net) ).
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