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Search: id:A078575
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| A078575 |
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Sum of divisors of the average of n-th twin prime pair. |
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+0
3
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| 7, 12, 28, 39, 72, 96, 168, 195, 216, 280, 288, 372, 546, 508, 468, 560, 744, 720, 576, 840, 840, 1344, 1240, 1152, 1170, 1440, 1860, 1248, 1296, 2016, 2178, 1656, 2184, 2016, 2223, 3024, 2640, 2976, 2340, 3136, 3315, 3024, 2808, 3168, 3072, 4320, 4032
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OFFSET
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1,1
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COMMENT
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a(n)=A000203(A014574(n)).
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EXAMPLE
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4-th twin prime pair = (A001359(4), A006512(4)) = (17,19), hence A014574(4) = 18 with divisors = {1,2,3,6,9,18} therefore a(4) = 1+2+3+6+9+18 = 39.
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CROSSREFS
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Cf. A078574, A078576, A078577.
Sequence in context: A011996 A093025 A104584 this_sequence A113499 A108238 A038278
Adjacent sequences: A078572 A078573 A078574 this_sequence A078576 A078577 A078578
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KEYWORD
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nonn
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AUTHOR
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Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Nov 29 2002
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