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A087305 Smallest n-digit non-palindromic number such that it and its digit reversal have the same prime signature. 0
13, 107, 1002, 10002, 100006, 1000007, 10000013, 100000005, 1000000007, 10000000006, 100000000007, 1000000000006, 10000000000003, 100000000000002, 1000000000000003, 10000000000000002, 100000000000000005 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..18.

EXAMPLE

a(6) = 100006 = 2*13*1613 and 600001 = 19*23*1373 both have prime signature p*q*r, p,q,r are primes.

CROSSREFS

Cf. A085869, A068893.

Sequence in context: A142364 A164301 A322499 * A168117 A244176 A038384

Adjacent sequences:  A087302 A087303 A087304 * A087306 A087307 A087308

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Sep 02 2003

EXTENSIONS

More terms from David Wasserman, Apr 19 2005

STATUS

approved

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Last modified August 14 10:58 EDT 2022. Contains 356116 sequences. (Running on oeis4.)