%I A091679
%S A091679 1,3,7,8,9,11,12,13,14,16,18,19,21,22,23,24,26,27,28,29,31,32,35,36,37,
%T A091679 38,39,40,43,44,45,46,47,48,49,52,53,54,55,56,57,60,61,62,63,64,66,69,
%U A091679 70,71,72,73,74,77,78,79,80,81,82,83,86,87,88,89,90,91,94,95,96,97,98
%N A091679 In base 4, numbers n not of the form k + reverse(k) for any k.
%C A091679 Base 4 analogue of A067031. Complement of A091678.
%e A091679 31 is a term since 31 (decimal) = 133 and there is no k such that k + 
               reverse(k) = 133 in base 4.
%Y A091679 Cf. A091678, A067031.
%Y A091679 Sequence in context: A103560 A011398 A059101 this_sequence A116034 A122987 
               A047530
%Y A091679 Adjacent sequences: A091676 A091677 A091678 this_sequence A091680 A091681 
               A091682
%K A091679 base,easy,nonn
%O A091679 0,2
%A A091679 Klaus Brockhaus (klaus-brockhaus(AT)t-online.de), Jan 28 2004