%I #21 Sep 29 2020 07:45:41
%S 1,11,10901,109901,1090901,1099901,10900901,10999901,100909001,
%T 109000901,109090901,109909901,109999901,1090000901,1090990901,
%U 1099009901,1099999901,10090909001,10900000901,10900900901,10909090901,10909990901
%N Palindromes which are not the arithmetic mean of two distinct positive palindromes.
%C In this sequence 0 is not allowed as an addend. If 0 were allowed then 0 would be a term and 1 and 11 would not.  _YuanHao Huang_, Aug 31 2020
%e 191 is not in the sequence since it is the arithmetic mean of two distinct positive palindromes, 9 and 373.
%Y Cf. A002113, A083158.
%K base,nonn
%O 1,2
%A _Giovanni Resta_, Feb 06 2006
%E a(1)=1 inserted by _YuanHao Huang_, Aug 31 2020
