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A110790
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Copies of 3 and 1 alternately such that every partial concatenation is a prime.
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3
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3, 1, 3, 111111111111111, 33333, 111111111111111111111111111111111111111111111111111111111111111111111111111111111111111, 3333, 111111111111111111111111111, 33333
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| The next term has 168 digits. [From Charles R Greathouse IV, Sep 29 2008]
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LINKS
| Charles R Greathouse IV, Home Page [in lieu of email address]
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EXAMPLE
| 3,31,313,313111111111111111,... are all prime.
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CROSSREFS
| Cf. A110774, A110775, A110776, A110777, A110778, A110779, A110780, A110781, A110782, A110783, A110788, A110789, A110791.
Sequence in context: A040173 A128777 A067009 * A119719 A125162 A174382
Adjacent sequences: A110787 A110788 A110789 * A110791 A110792 A110793
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KEYWORD
| base,easy,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 13 2005
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EXTENSIONS
| a(6)-a(9) from Charles R Greathouse IV Sep 29 2008
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