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%I #6 Jan 20 2014 18:59:49
%S 0,0,0,1,0,1,1,13,1,18,68,142,237,862,1672,3188,1768,6078,16090,32566,
%T 62214,181695,380903,802572,1634880,3784693,7871112,17020646,36800640,
%U 78582498,168074511,206295476,209557176,490017420,1097340244,2222684855,5116364054
%N Number of binary words of length n with exactly 2 (possibly overlapping) occurrences of the subword given by the binary expansion of n.
%H Alois P. Heinz, <a href="/A236231/b236231.txt">Table of n, a(n) for n = 0..1000</a>
%Y Column k=2 of A233940.
%K nonn
%O 0,8
%A _Alois P. Heinz_, Jan 20 2014