%I A068188
%S A068188 11,101,181,18181,1008001,1180811,1880881,1881881,100111001,100888001,
%T A068188 108101801,110111011,111010111,111181111,118818811,180101081,181111181,
%U A068188 181888181,188010881,188888881,10008180001,10081818001
%N A068188 Tetradic primes (primes in A006072).
%C A068188 Primes that are palindromes and use only the digits 0, 1 and 8, so they 
               read the same backwards and upside down.
%H A068188 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/
               TetradicNumber.html">Tetradic Number</a>
%Y A068188 Sequence in context: A083185 A007597 A061247 this_sequence A032592 A142317 
               A121402
%Y A068188 Adjacent sequences: A068185 A068186 A068187 this_sequence A068189 A068190 
               A068191
%K A068188 nonn,easy,base
%O A068188 0,1
%A A068188 Eric Weisstein (eric(AT)weisstein.com), Feb 18, 2002
%E A068188 Edited by Jud McCranie (j.mccranie(AT)comcast.net), Jun 02, 2003