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A062214
Numbers k such that the smoothly undulating palindromic number(18*10^k - 81)/99 is a prime.
0
3, 5, 77, 163, 1479, 3657, 4573, 8315, 30259, 31063, 31855, 36915, 66657
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=5 -> (18*10^5 - 81)/99 = 18181.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Patrick De Geest and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001
EXTENSIONS
a(13)=66657 from Ray Chandler, Jan 31 2011
Edited by Ray Chandler, Aug 17 2011
STATUS
approved