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A216813
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Sum of tail length of S over all 2^n strings S consisting of n 2's and 3's.
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4
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0, 3, 6, 18, 39, 96, 201, 582, 1220, 2590, 5345, 10919, 21859, 44167, 88629, 178050, 356598, 715084, 1431514, 2866876, 5736311, 11480839, 22966942, 45949687, 91910241, 183852468, 367726473, 735517466, 1471078571, 2942286009, 5884661772, 11769583511, 23539346216, 47079214312, 94158788295
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OFFSET
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1,2
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COMMENTS
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"Tail length" is defined in A216730.
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LINKS
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FORMULA
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Up to n=32, the average tail length a(n)/2^n seems to be approaching a number around 2.74.
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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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