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

1,1

LINKS

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

EXAMPLE

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

CROSSREFS

Sequence in context: A058913 A236301 A218166 * A033382 A143733 A296766

Adjacent sequences:  A106654 A106655 A106656 * A106658 A106659 A106660

KEYWORD

base,nonn

AUTHOR

Shyam Sunder Gupta, May 12 2005

STATUS

approved

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Last modified September 17 19:58 EDT 2021. Contains 347489 sequences. (Running on oeis4.)