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A074225
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a(n) = n * Sum_{d|n} d*2^(d-1).
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1
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1, 10, 39, 148, 405, 1254, 3143, 8488, 20853, 52050, 123915, 297804, 692237, 1611974, 3687795, 8405584, 18939921, 42512562, 94634003, 209819940, 462431697, 1015269486, 2218786839, 4832458392, 10485762025, 22684180610, 48922424415, 105229923596
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OFFSET
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1,2
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LINKS
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MATHEMATICA
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PROG
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(PARI) vector(100, n, n*sumdiv(n, d, d*2^(d-1))) \\ Colin Barker, Jan 29 2015
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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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