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%I #24 Aug 11 2024 14:41:34
%S 7,55,109,145,229,961
%N Numbers k such that the smoothly undulating palindromic number (16*10^k - 61)/99 is a prime.
%C Prime versus probable prime status and proofs are given in the author's table.
%C No further terms < 100000. - _Ray Chandler_, Aug 17 2011
%H P. De Geest, <a href="https://www.worldofnumbers.com/undulat.htm#supp161">SUPP Reference Table - 161</a>
%H <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a>
%e k=7 -> (16*10^7 - 61)/99 = 1616161.
%Y Cf. A062209-A062232, A059758, A032758.
%K nonn,base
%O 1,1
%A _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001
%E Edited by _Ray Chandler_, Aug 17 2011