The On-Line Encyclopedia of Integer Sequences (OEIS)

The OEIS is supported by the many generous donors to the OEIS Foundation.

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

Other ways to Give

A062217 revision #10

A062217

Numbers k such that the smoothly undulating palindromic number (32*10^k - 23)/99 is a prime.

0

5, 9, 11, 3015, 3407, 6959, 9599, 11399, 16593, 25883

(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..10.

P. De Geest, SUPP Reference Table - 323

Index entries for sequences related to smoothly undulating palindromic primes

EXAMPLE

a(n)=11 -> (32*10^11 - 23)/99 = 32323232323.

CROSSREFS

Cf. A062209-A062232, A059758, A032758.

Sequence in context: A120228 A053749 A099082 * A331053 A314605 A314606

Adjacent sequences: A062214 A062215 A062216 * A062218 A062219 A062220

KEYWORD

nonn,base

AUTHOR

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

EXTENSIONS

Edited by Ray Chandler, Aug 17 2011

STATUS

editing