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A351363
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Number of necklaces with n black and n white beads with at least four consecutive black beads.
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1
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0, 0, 0, 1, 5, 21, 84, 327, 1251, 4760, 18018, 68104, 257088, 970480, 3664070, 13842215, 52331695, 198021936, 750027090, 2843686271, 10792866315, 41006110365, 155961264880, 593797895358, 2263126224780, 8634161689920, 32973466762098, 126047166461574, 482298648250416, 1847156083546316
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listen;
history;
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internal format)
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OFFSET
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1,5
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LINKS
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FORMULA
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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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