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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 (list; graph; refs; listen; history; text; internal format)
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 December 1 17:49 EST 2022. Contains 358475 sequences. (Running on oeis4.)