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A087325 Numbers n such that n and its 10's complement both have the same prime signature. 1
3, 5, 7, 11, 14, 15, 17, 26, 29, 30, 35, 38, 41, 47, 50, 53, 59, 62, 65, 70, 71, 74, 83, 85, 86, 89, 94, 97, 110, 111, 113, 122, 129, 132, 134, 137, 140, 150, 153, 158, 170, 173, 174, 179, 183, 185, 186, 187, 191, 195, 201, 206, 209, 212, 215, 219, 221, 227, 236 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Conjecture: (1) Sequence is infinite. (2) For every prime signature there corresponds a term in this sequence.

LINKS

Table of n, a(n) for n=1..59.

EXAMPLE

35 is a member as 35= 5*7 and its 10's complement (100-35) = 65 = 13*5 both have the prime signature p*q.

35 is a member as 35 = 5*7 and its 10's complement (100-35) = 65 = 13*5 both have the prime signature p*q.

CROSSREFS

Cf. A087324.

Sequence in context: A288892 A123677 A133954 * A072151 A332028 A280018

Adjacent sequences: A087322 A087323 A087324 * A087326 A087327 A087328

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Sep 04 2003

EXTENSIONS

More terms from David Wasserman, May 06 2005

STATUS

approved

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Last modified December 9 23:05 EST 2022. Contains 358710 sequences. (Running on oeis4.)