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A106659 Smallest semiprime ending in exactly n 5's. 0
15, 55, 1555, 125555, 655555, 1555555, 145555555, 355555555, 8555555555, 85555555555, 155555555555, 1555555555555, 25555555555555, 155555555555555, 17555555555555555, 25555555555555555, 655555555555555555 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

EXAMPLE

a(3)=1555 is a term because 1555 is the smallest semiprime ending in exactly three 5's.

CROSSREFS

Sequence in context: A080698 A082235 A104724 * A119136 A036522 A157856

Adjacent sequences:  A106656 A106657 A106658 * A106660 A106661 A106662

KEYWORD

base,nonn

AUTHOR

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

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Last modified February 16 08:13 EST 2012. Contains 205893 sequences.