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A062216 Numbers k such that the smoothly undulating palindromic number (31*10^k - 13)/99 is a prime. 1
3, 51, 83, 225, 561, 10419, 18255, 43869 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Prime versus probable prime status and proofs are given in the author's table.

No further terms < 100000. - Ray Chandler, Aug 17 2011

LINKS

Table of n, a(n) for n=1..8.

P. De Geest, SUPP Reference Table - 313

Index entries for sequences related to smoothly undulating palindromic primes

EXAMPLE

k=51 -> (31*10^51 - 13)/99 = 313131313131313131313131313131313131313131313131313.

CROSSREFS

Cf. A062209-A062232, A059758, A032758.

Sequence in context: A304701 A316452 A227069 * A305012 A316173 A316645

Adjacent sequences:  A062213 A062214 A062215 * A062217 A062218 A062219

KEYWORD

nonn,base

AUTHOR

Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

EXTENSIONS

43869 from Ray Chandler, Sep 30 2010

Edited by Ray Chandler, Aug 17 2011

STATUS

approved

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Last modified June 16 19:05 EDT 2021. Contains 345068 sequences. (Running on oeis4.)