%I #7 Oct 10 2019 00:43:48
%S 11,12,14,18,1116,1312,1614,111218,121516,151112,11101214,12101418,
%T 14101916,18111912,1116131814,1312171618,16251316,111311101712,
%U 1216121124,1512141228,11101418151716,12101917111512,14111914131014
%N Describe 2^n.
%e 16 has "one 1, one 6", so a(4) = 1116.
%Y Cf. A005150, A045986, A045988.
%K nonn,easy,base
%O 0,1
%A _N. J. A. Sloane_
%E More terms from _Patrick De Geest_, Jun 15 1999