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A062229
Numbers k such that the smoothly undulating palindromic number (94*10^k - 49)/99 is a prime.
0
5, 17, 65, 143, 551, 92981
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
EXAMPLE
k=17 -> (94*10^17 - 49)/99 = 94949494949494949.
CROSSREFS
KEYWORD
nonn,base,more
AUTHOR
Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001
EXTENSIONS
a(6) from Ray Chandler, Jul 29 2011
Edited by Ray Chandler, Aug 17 2011
STATUS
approved