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A062232 Numbers k such that the smoothly undulating palindromic number (98*10^k - 89)/99 is a prime. 24
9, 161, 219, 4859, 21989, 52931, 88595 (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
Patrick De Geest, SUPP Reference Table - 989
EXAMPLE
k=9 -> (98*10^9 - 89)/99 = 989898989.
CROSSREFS
Sequence in context: A363479 A217392 A327978 * A337627 A020523 A023039
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001
EXTENSIONS
a(6)=52931 from Ray Chandler, Nov 11 2010
a(7)=88595 from Ray Chandler, Jul 23 2011
Edited by Ray Chandler, Aug 17 2011
STATUS
approved

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Last modified March 18 22:56 EDT 2024. Contains 370952 sequences. (Running on oeis4.)