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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).
4
3, 31, 131, 1319, 913103, 3013193, 39131033, 3301319309, 903913103341, 14330131930927, 729039131033419, 9143301319309279, 97290391310334191, 1914330131930927929, 929729039131033419149, 94191433013193092792927
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
EXAMPLE
a(2)= 31, a(3) is the smallest prime beginning with 31 and is 131.
CROSSREFS
KEYWORD
base,nonn
AUTHOR
Amarnath Murthy, Sep 09 2003
EXTENSIONS
More terms from David Wasserman, May 25 2005
STATUS
approved