A106663 Smallest semiprime ending in exactly n 9's.

9, 299, 5999, 19999, 899999, 5999999, 79999999, 299999999, 1999999999, 49999999999, 499999999999, 1999999999999, 29999999999999, 199999999999999, 1999999999999999, 29999999999999999, 599999999999999999

Offset

1,1

Comments

When (if ever) does this differ from A104775? - Andrew S. Plewe, Apr 11 2007

Links

Table of n, a(n) for n=1..17.

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

Adjacent sequences: A106660 A106661 A106662 * A106664 A106665 A106666

Keyword

base,nonn

Author

Shyam Sunder Gupta, May 12 2005

Status

approved