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A106663 Smallest semiprime ending in exactly n 9's. 1
9, 299, 5999, 19999, 899999, 5999999, 79999999, 299999999, 1999999999, 49999999999, 499999999999, 1999999999999, 29999999999999, 199999999999999, 1999999999999999, 29999999999999999, 599999999999999999 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
When (if ever) does this differ from A104775? - Andrew S. Plewe, Apr 11 2007
LINKS
EXAMPLE
a(3)=5999 is a term because 5999 is the smallest semiprime ending in exactly three 9's.
CROSSREFS
Sequence in context: A061685 A183549 A104775 * A196694 A196727 A197067
KEYWORD
base,nonn
AUTHOR
Shyam Sunder Gupta, May 12 2005
STATUS
approved

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Last modified March 19 03:33 EDT 2024. Contains 370952 sequences. (Running on oeis4.)