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In base 2: numbers n not of the form k + reverse(k) for any k.
1

%I #5 Jul 11 2015 00:55:04

%S 1,4,7,8,11,12,13,16,19,20,22,23,26,28,29,31,32,36,38,39,40,41,43,46,

%T 47,48,49,50,53,55,56,58,59,60,61,64,67,68,70,71,72,73,74,76,77,79,80,

%U 82,83,86,87,88,89,91,92,94,95,97,98,100,103,104,106,107,109,110,111,112

%N In base 2: numbers n not of the form k + reverse(k) for any k.

%C Base-2 analog of A067031 (base 10) and A091679 (base 4). Complement of A092213.

%e 13 is a term since 13 (decimal) = 1101 and there is no k such that k + reverse(k) = 1101 in base 2.

%Y Cf. A092213, A067031, A091679.

%K nonn,base,easy

%O 0,2

%A _Klaus Brockhaus_, Feb 25 2004