%I #17 Apr 05 2019 12:00:01

%S 0,1,1,0,0,0,1,0,0,0,1,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,

%T 0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,

%U 0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,1

%N Characteristic sequence of A277238.

%H Antti Karttunen, <a href="/A280910/b280910.txt">Table of n, a(n) for n = 0..65537</a>

%H <a href="/index/Bi#binary">Index entries for sequences related to binary expansion of n</a>

%H <a href="/index/Ch#char_fns">Index entries for characteristic functions</a>

%o (PARI) A280910(n) = if(n<=1, n, my(b = binary(n)); if ((#b % 2) && (b[#b\2+1] == 0), return (0)); vecmin(vector(#b\2, k, bitxor(b[k], b[#b-k+1]))) == 1); \\ _Antti Karttunen_, Dec 23 2018, after isok function given in A277238 by _Michel Marcus_, Oct 07 2016

%Y Cf. A277238.

%K nonn

%O 0

%A _Taylor J. Smith_, Jan 10 2017

%E Term a(0) = 0 prepended and more terms added by _Antti Karttunen_, Dec 23 2018