|
|
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
|
|
|
|