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A086698 Two-sided semiprimes: deleting any number of digits at left or at right, but not both, leaves a semiprime. 1
4, 6, 9, 46, 49, 69, 94, 469, 626, 694, 914, 934, 939, 949, 4694, 4934, 4939, 9134, 9346, 9586, 62386, 62614, 91346, 959939, 6998339, 91439939 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

a(18)=9134 is a term because 9134, 913,134,34,91,4,9 all are semiprimes.

CROSSREFS

Sequence in context: A085733 A242751 A107342 * A317248 A115666 A245044

Adjacent sequences:  A086695 A086696 A086697 * A086699 A086700 A086701

KEYWORD

base,fini,full,nonn

AUTHOR

Shyam Sunder Gupta, Jul 28 2003

STATUS

approved

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Last modified June 19 00:55 EDT 2019. Contains 324217 sequences. (Running on oeis4.)