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, 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

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