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A115997
Numbers k such that the concatenation of k with the k-th prime gives a palindrome.
1
7, 16638, 3631421, 141521639, 3087218304
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OFFSET
1,1
LINKS
Table of n, a(n) for n=1..5.
EXAMPLE
prime(3087218304)=74038127803 and 308721830474038127803 is a palindrome.
CROSSREFS
Cf.
A109304
,
A115996
.
Sequence in context:
A203685
A134645
A327840
*
A013786
A351326
A285178
Adjacent sequences:
A115994
A115995
A115996
*
A115998
A115999
A116000
KEYWORD
nonn
,
base
AUTHOR
Giovanni Resta
, Feb 13 2006
STATUS
approved
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Last modified August 30 11:14 EDT 2024. Contains 375543 sequences. (Running on oeis4.)