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A340928
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Least image of A001222 applied to the prime indices of n.
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1
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0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 3, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 2, 0, 1, 0, 4, 0, 1, 0, 1, 0, 1, 0, 3, 0, 1, 0, 1, 0, 1, 0, 1, 0, 3, 0, 2, 0, 1, 0, 1, 0, 2, 0, 1, 0, 1, 0, 1, 0, 1
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OFFSET
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1,7
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COMMENTS
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A prime index of n is a number m such that prime(m) divides n. The multiset of prime indices of n is row n of A112798.
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LINKS
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EXAMPLE
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The prime indices of 4277 are {4,6,15} with images {2,2,2}, so a(4277) = 2.
The prime indices of 8303 are {8,8,9} with images {3,3,2}, so a(8303) = 2.
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MATHEMATICA
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Table[If[n==1, 0, Min@@PrimeOmega/@PrimePi/@First/@FactorInteger[n]], {n, 100}]
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CROSSREFS
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Positions of first appearances are A033844.
The version for maximum is A340691.
A003963 multiplies together the prime indices.
A026794 counts partitions by sum and minimum.
A061395 selects the greatest prime index.
A112798 lists the prime indices of each positive integer.
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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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