A087390 a(1) = 7; a(n+1) is the least prime formed by adding one or more digits to the digit reversal of a(n).

7, 71, 173, 3719, 91733, 3371947, 749173303, 3033719477, 774917330303, 30303371947759, 957749173303031, 13030337194775911, 1195774917330303119, 9113030337194775911093, 390119577491733030311941

Offset

1,1

Links

Table of n, a(n) for n=1..15.

Example

a(2) = 71, a(3) is the smallest prime beginning with 17 and is 173.

Crossrefs

Cf. A087388, A087389, A087391.

Sequence in context: A107163 A179784 A142037 * A142928 A201261 A069634

Adjacent sequences: A087387 A087388 A087389 * A087391 A087392 A087393

Keyword

base,nonn

Author

Amarnath Murthy, Sep 09 2003

Extensions

More terms from David Wasserman, May 25 2005

Status

approved