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A217858
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Odd part of lcm(1,2,3,...,n).
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3
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1, 1, 3, 3, 15, 15, 105, 105, 315, 315, 3465, 3465, 45045, 45045, 45045, 45045, 765765, 765765, 14549535, 14549535, 14549535, 14549535, 334639305, 334639305, 1673196525, 1673196525, 5019589575, 5019589575, 145568097675, 145568097675, 4512611027925, 4512611027925, 4512611027925
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OFFSET
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1,3
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LINKS
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FORMULA
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EXAMPLE
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a(8) is the least common multiple of {1,3,5,7}.
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MAPLE
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A217858 := n -> ilcm(op(select(j->j mod 2 = 1, [$1..n]))):
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MATHEMATICA
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PROG
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(PARI)
(Sage)
def A217858(n): return lcm([j for j in (1..n) if is_odd(j)])
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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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