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A106657 Smallest semiprime ending in exactly n 2's. +0
1
62, 22, 4222, 32222, 622222, 1222222, 142222222, 122222222, 7222222222, 62222222222, 622222222222, 4222222222222, 62222222222222, 722222222222222, 10222222222222222, 202222222222222222, 322222222222222222 (list; graph; listen)
OFFSET

1,1

EXAMPLE

a(3)=4222 is a term because 4222 is the smallest semiprime ending in exactly three 2's.

CROSSREFS

Sequence in context: A022084 A110823 A058913 this_sequence A033382 A143733 A003635

Adjacent sequences: A106654 A106655 A106656 this_sequence A106658 A106659 A106660

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta (guptass(AT)rediffmail.com), May 12 2005

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Last modified December 10 12:37 EST 2009. Contains 170569 sequences.


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