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A359601
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Dirichlet inverse of A244042, where A244042(n) replaces 2's with 0's in the ternary representation of n.
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2
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1, 0, -3, -4, -3, 0, -1, 0, 0, -10, -9, 12, -13, -12, 9, 6, -9, 0, -1, 24, 3, -4, -3, 0, 8, 0, 0, -20, -27, 30, -31, -30, 27, -28, -21, 0, -37, -36, 39, 40, -39, 36, -37, 36, 0, -28, -27, -18, -30, 30, 27, 76, -27, 0, 53, 96, 3, -4, -3, -72, -1, 0, 0, 6, 69, 12, -13, 60, 9, 82, -9, 0, -1, 0, -24, 4, 15
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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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a(1) = 1, and for n > 1, a(n) = -Sum_{d|n, d<n} A244042(n/d) * a(d).
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PROG
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(PARI)
A244042(n) = fromdigits(apply(x->(x%2), digits(n, 3)), 3);
memoA359601 = Map();
A359601(n) = if(1==n, 1, my(v); if(mapisdefined(memoA359601, n, &v), v, v = -sumdiv(n, d, if(d<n, A244042(n/d)*A359601(d), 0)); mapput(memoA359601, n, v); (v)));
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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