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A116063 Semiprimes (A001358) made of nontrivial runs of identical digits. 1
22, 33, 55, 77, 111, 1111, 1133, 1177, 1199, 3377, 4411, 4499, 5533, 5599, 6611, 6677, 7711, 7799, 8899, 9977, 11111, 11199, 11333, 11555, 22233, 22255, 22299, 22333, 22999, 33322, 44222, 44333, 44411, 44477, 44999, 55111, 55222, 55577 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

A run of length 1 is trivial.

LINKS

Table of n, a(n) for n=1..38.

EXAMPLE

44477 = 79*563

CROSSREFS

Cf. A001358, A033023, A116062.

Sequence in context: A120146 A138840 A257473 * A131317 A176597 A067087

Adjacent sequences:  A116060 A116061 A116062 * A116064 A116065 A116066

KEYWORD

nonn,base

AUTHOR

Giovanni Resta, Feb 13 2006

STATUS

approved

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Last modified August 23 11:46 EDT 2017. Contains 290995 sequences.