A236231 Number of binary words of length n with exactly 2 (possibly overlapping) occurrences of the subword given by the binary expansion of n.

0, 0, 0, 1, 0, 1, 1, 13, 1, 18, 68, 142, 237, 862, 1672, 3188, 1768, 6078, 16090, 32566, 62214, 181695, 380903, 802572, 1634880, 3784693, 7871112, 17020646, 36800640, 78582498, 168074511, 206295476, 209557176, 490017420, 1097340244, 2222684855, 5116364054

Offset

0,8

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Crossrefs

Column k=2 of A233940.

Sequence in context: A278634 A306507 A094709 * A040181 A123187 A272797

Adjacent sequences: A236228 A236229 A236230 * A236232 A236233 A236234

Keyword

nonn

Author

Alois P. Heinz, Jan 20 2014

Status

approved