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A365711
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Dirichlet inverse of balanced ternary enumeration of integers (A117966).
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8
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1, 1, -3, -3, -2, -3, 2, -3, 0, -14, -8, 9, -13, -7, 6, 6, -5, 0, 8, 0, -6, -11, 7, 9, 15, -13, 0, -60, -26, 42, -31, -30, 24, -35, -31, 0, -37, -19, 39, 54, -38, 21, -34, 18, 0, -5, -17, -18, -18, 54, 15, 75, -14, 0, 58, 3, -24, -29, 25, 0, 29, -31, 0, -57, 71, 33, 14, -9, -21, -46, 22, 0, 35, -37, -45, -78, 2, 39
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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} A117966(n/d) * a(d).
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PROG
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(PARI)
memoA365711 = Map();
A365711(n) = if(1==n, 1, my(v); if(mapisdefined(memoA365711, n, &v), v, v = -sumdiv(n, d, if(d<n, A117966(n/d)*A365711(d), 0)); mapput(memoA365711, n, v); (v)));
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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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