%N a(n) = (A253079(n)-1)/4.
%C It almost looks like one should be able to guess a recurrence. It would be nice to know more.
%H <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>
%Y Cf. A253079, A253080.
%A _N. J. A. Sloane_, Feb 04 2015