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A164425
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Number of binary strings of length n with no substrings equal to 0000 0010 or 1111
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1
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13, 22, 37, 62, 105, 177, 298, 502, 846, 1426, 2403, 4049, 6823, 11498, 19376, 32651, 55021, 92718, 156243, 263291, 443681, 747663, 1259915, 2123130, 3577765, 6029024, 10159732, 17120542, 28850461, 48616982, 81926280, 138057015, 232645000
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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4,1
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LINKS
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FORMULA
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G.f. -x^4*(13+9*x+15*x^2+12*x^3+8*x^4) / ( -1+x+x^3+x^4+x^5 ). - R. J. Mathar, Dec 01 2011
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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