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1, -1, -5, -5, -21, 11, -53, -53, -53, 459, -565, -565, -4661, 3531, 19915, 19915, -45621, -45621, -307765, -307765, 740811, 2837963, -1356341, -1356341, -1356341, 32198091, 32198091, 32198091, -236237365, -773108277
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,3
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LINKS
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EXAMPLE
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a(3) = -5 = (1 - 2 - 4).
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MAPLE
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a:= proc(n) option remember;
numtheory[mobius](n)*2^(n-1) +`if`(n=1, 0, a(n-1))
end:
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MATHEMATICA
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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