A261921 - OEIS

%I #5 Sep 15 2015 15:52:04

%S 12,13,14,15,16,17,18,19,20,23,24,25,26,27,28,29,30,31,34,35,36,37,38,

%T 39,40,41,42,45,46,47,48,49,50,51,52,53,56,57,58,59,60,61,62,63,64,67,

%U 68,69,70,71,72,73,74,75,78,79,80,81,82,83,84,85,86,89,90,91,92,93,94,95,96,97,100,101,102,103,104,105,106,107,108,112,122,123,132

%N Nonpalindromes which are the sum of two palindromes whose lengths differ by 1.

%C More than the usual number of terms are displayed in order to show that this is different from A261907.

%e 12=11+1 and 100=99+1 are members.

%e 10 is not a member since it is only the sum of two palindromes (5+5) whose lengths are equal.

%Y Cf. A002113. A subsequence of A261907. A261920 shows the differences.

%K nonn,base

%O 1,1

%A _David Applegate_ and _N. J. A. Sloane_, Sep 15 2015