A062229 - OEIS

%I #16 Oct 31 2019 01:24:42

%S 5,17,65,143,551,92981

%N Numbers k such that the smoothly undulating palindromic number (94*10^k - 49)/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 Patrick De Geest, <a href="http://www.worldofnumbers.com/undulat.htm#supp949">SUPP Reference Table - 949</a>

%H <a href="/index/Pri#pri_supp">Index entries for sequences related to smoothly undulating palindromic primes</a>

%e k=17 -> (94*10^17 - 49)/99 = 94949494949494949.

%Y Cf. A062209-A062232, A059758, A032758.

%K nonn,base,more

%O 1,1

%A _Patrick De Geest_ and Hans Rosenthal (Hans.Rosenthal(AT)t-online.de), Jun 15 2001

%E a(6) from _Ray Chandler_, Jul 29 2011

%E Edited by _Ray Chandler_, Aug 17 2011