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A328868
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Heinz numbers of integer partitions with no two (not necessarily distinct) parts relatively prime, but with no divisor in common to all of the parts.
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5
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17719, 40807, 43381, 50431, 74269, 83143, 101543, 105703, 116143, 121307, 123469, 139919, 140699, 142883, 171613, 181831, 185803, 191479, 203557, 205813, 211381, 213239, 215267, 219271, 230347, 246703, 249587, 249899, 279371, 286897, 289007, 296993, 300847
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OFFSET
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1,1
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COMMENTS
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The Heinz number of an integer partition (y_1,...,y_k) is prime(y_1)*...*prime(y_k).
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LINKS
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EXAMPLE
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The sequence of terms together with their prime indices begins:
17719: {6,10,15}
40807: {6,14,21}
43381: {6,15,20}
50431: {10,12,15}
74269: {6,10,45}
83143: {10,15,18}
101543: {6,21,28}
105703: {6,15,40}
116143: {12,14,21}
121307: {10,15,24}
123469: {12,15,20}
139919: {6,15,50}
140699: {6,22,33}
142883: {6,10,75}
171613: {6,14,63}
181831: {6,20,45}
185803: {10,14,35}
191479: {14,18,21}
203557: {15,18,20}
205813: {10,15,36}
211381: {10,12,45}
213239: {6,15,70}
215267: {6,10,105}
219271: {6,26,39}
230347: {6,6,10,15}
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MATHEMATICA
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primeMS[n_]:=If[n==1, {}, Flatten[Cases[FactorInteger[n], {p_, k_}:>Table[PrimePi[p], {k}]]]];
dv=Select[Range[100000], GCD@@primeMS[#]==1&&And[And@@(GCD[##]>1&)@@@Tuples[Union[primeMS[#]], 2]]&]
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CROSSREFS
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These are the Heinz numbers of the partitions counted by A202425.
Terms of A328679 that are not powers of 2.
The strict case is A318716 (preceded by 2).
A ranking using binary indices (instead of prime indices) is A326912.
Heinz numbers of relatively prime partitions are A289509.
Cf. A000837, A056239, A112798, A200976, A291166, A302796, A316476, A318715, A319752, A319759, A328336, A328672, A328677, A328867.
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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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