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0, 1, 4, 12, 37, 111, 333, 1000, 3001, 9003, 27009, 81028, 243084, 729253, 2187760, 6563280, 19689841, 59069523, 177208569, 531625708, 1594877124, 4784631373, 14353894120, 43061682360, 129185047080, 387555141241, 1162665423724
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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0,3
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COMMENTS
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A Thue-Morse convolution.
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LINKS
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FORMULA
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a(n) = Sum_{k=0..n} A010060(n-k) * 3^k.
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MATHEMATICA
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Table[Sum[ThueMorse[n - k]*3^k, {k, 0, n}], {n, 0, 100}] (* G. C. Greubel, May 23 2018 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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