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%I #6 Aug 13 2015 04:05:49
%S 2,4,6,8,10,14,16,18,20,22,24,26,28,30,32,34,38,40,42,44,46,50,52,54,
%T 56,58,62,64,66,68,70,72,74,76,78,80,82,86,88,90,92,94,96,98,100,102,
%U 104,106,110,112,114,116,118,120,122,124,126,128,130,134,136
%N Positions of 0 in the infinite palindromic word at A260390.
%C Complement of A260392, the positions of 1. See A260390 for a guide to related sequences.
%H Clark Kimberling, <a href="/A260391/b260391.txt">Table of n, a(n) for n = 1..10000</a>
%t u[1] = {1, 0}; m[1] = {u[1][[1]]};
%t u[n_] := u[n] = Join[u[n - 1], m[n - 1], Reverse[u[n - 1]]];
%t m[k_] := {u[k - 1][[k]]}; u[8] (* A260390 *)
%t Table[Length[u[n]], {n, 1, 20}] (* A083329 *)
%t Flatten[Position[u[8], 0]] (* A260391 *)
%t Flatten[Position[u[8], 1]] (* A260392 *)
%Y Cf. A260390, A260392.
%K nonn,easy
%O 1,1
%A _Clark Kimberling_, Jul 31 2015