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A164416
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Number of binary strings of length n with no substrings equal to 0000 0001 or 1111
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1
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13, 23, 40, 69, 120, 208, 361, 626, 1086, 1884, 3268, 5669, 9834, 17059, 29592, 51333, 89047, 154469, 267956, 464821, 806321, 1398718, 2426344, 4208958, 7301243, 12665403, 21970565, 38112149, 66112815, 114685328, 198943646, 345105821
(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+23*x+27*x^2+20*x^3+8*x^4) / ( -1+x^2+2*x^3+2*x^4+x^5 ). - R. J. Mathar, Nov 30 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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