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A110790 Copies of 3 and 1 alternately such that every partial concatenation is a prime. +0
4
3, 1, 3, 111111111111111, 33333, 11111111111111111111111111111111111111111111111111111111111111111111111111111111\ 1111111, 3333, 111111111111111111111111111, 33333 (list; graph; listen)
OFFSET

1,1

COMMENT

The next term has 168 digits. [From Charles R Greathouse IV, Sep 29 2008]

LINKS

Charles R Greathouse IV, Home Page [in lieu of email address]

EXAMPLE

3,31,313,313111111111111111,... are all prime.

CROSSREFS

Cf. A110774, A110775, A110776, A110777, A110778, A110779, A110780, A110781, A110782, A110783, A110788, A110789, A110791.

Sequence in context: A040173 A128777 A067009 this_sequence A119719 A125162 A123730

Adjacent sequences: A110787 A110788 A110789 this_sequence A110791 A110792 A110793

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 13 2005

EXTENSIONS

a(6)-a(9) from Charles R Greathouse IV Sep 29 2008

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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.


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