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Search: id:A074370
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| A074370 |
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Sum of the divisors of Sum_{i=1,...,n} prime(i). |
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+0
1
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| 3, 6, 18, 18, 56, 42, 90, 96, 217, 176, 378, 198, 432, 282, 630, 512, 1080, 672, 1080, 936, 1350, 912, 1440, 1404, 2268, 1760, 2480, 1832, 3420, 2400, 3960, 2472, 4032, 2840, 3990, 3240, 5400, 2856, 4608, 5200
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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sigma(prime(1) + prime(2) + prime(3)) = sigma(10) = 18, so a(3) = 18.
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MATHEMATICA
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s = 0; l = {}; Do[s = s + Prime[i]; l = Append[l, DivisorSigma[1, s]], {i, 1, 100}]; l
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CROSSREFS
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Sequence in context: A003323 A073591 A078318 this_sequence A088339 A064400 A117863
Adjacent sequences: A074367 A074368 A074369 this_sequence A074371 A074372 A074373
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KEYWORD
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easy,nonn
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AUTHOR
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Joseph L. Pe (joseph_l_pe(AT)hotmail.com), Sep 24 2002
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