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A347118
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Möbius transform of A332449.
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3
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1, 3, 8, 6, 24, 4, 48, 20, 12, 8, 120, 0, 168, 48, 48, 60, 288, 12, 360, 208, 168, 72, 528, 24, 30, 312, 84, 384, 840, -32, 960, 180, 312, 384, 552, 108, 1368, 792, 912, 480, 1680, -136, 1848, 1008, -54, 912, 2208, 72, 42, 18, 1224, 1200, 2808, -4, 1080, 960, 2232, 1272, 3480, -244, 3720, 2400, 792, 540, 2832, -120
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graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,2
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LINKS
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FORMULA
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PROG
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(PARI)
A005940(n) = { my(p=2, t=1); n--; until(!n\=2, if((n%2), (t*=p), p=nextprime(p+1))); (t); };
A156552(n) = { my(f = factor(n), p, p2 = 1, res = 0); for(i = 1, #f~, p = 1 << (primepi(f[i, 1]) - 1); res += (p * p2 * (2^(f[i, 2]) - 1)); p2 <<= f[i, 2]); res };
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CROSSREFS
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KEYWORD
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sign
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AUTHOR
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STATUS
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approved
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