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A173716 Smallest number that contains the first n semiprimes as substrings. 0
4, 46, 469, 10469, 101469, 10141569, 101421569, 1014221569, 101421522569, 1014215225269, 101421522526339, 1014215225263349, 101421522526334359, 10142152252633435389, 101421522526334353839, 1014215225263346353839 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Semiprime analog of A054261.

REFERENCES

Jonathan Vos Post, Posting to the Sequence Fans Mailing List, May 24 2010

LINKS

Table of n, a(n) for n=1..16.

CROSSREFS

Cf. A000040, A001358, A054260, A035239, A178057, A144565, A169798.

Sequence in context: A194488 A132932 A231787 * A320229 A097952 A097643

Adjacent sequences:  A173713 A173714 A173715 * A173717 A173718 A173719

KEYWORD

nonn,base,more

AUTHOR

N. J. A. Sloane, Nov 25 2010

EXTENSIONS

More terms from Sean A. Irvine, Dec 02 2010

STATUS

approved

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Last modified May 10 15:06 EDT 2021. Contains 343773 sequences. (Running on oeis4.)