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A087389 a(1) = 3; a(n+1) is the least prime formed by adding one or more digits to the digit reversal of a(n). 3
3, 31, 131, 1319, 913103, 3013193, 39131033, 3301319309, 903913103341, 14330131930927, 729039131033419, 9143301319309279, 97290391310334191, 1914330131930927929, 929729039131033419149, 94191433013193092792927 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Note that the digit reversal of a(6) is 3913103, which is already prime, but a(7) is required to have more digits than a(6). - David Wasserman, May 25 2005

LINKS

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

EXAMPLE

a(2)= 31, a(3) is the smallest prime beginning with 31 and is 131.

CROSSREFS

Cf. A087388, A087390, A087391.

Sequence in context: A267941 A069630 A069615 * A294394 A064055 A227049

Adjacent sequences: A087386 A087387 A087388 * A087390 A087391 A087392

KEYWORD

base,nonn

AUTHOR

Amarnath Murthy, Sep 09 2003

EXTENSIONS

More terms from David Wasserman, May 25 2005

STATUS

approved

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Last modified January 27 06:33 EST 2023. Contains 359837 sequences. (Running on oeis4.)