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Search: id:A122125
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| A122125 |
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Indices n such that A122103[n] = Sum[ Prime[k]^5, {k,1,n}] is a prime. |
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+0
3
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| 66, 148, 150, 164, 174, 214, 238, 264, 312, 328, 354, 440, 516, 536, 616, 624, 724, 744, 774, 836, 940, 1002, 1030, 1034, 1038, 1064, 1086, 1092, 1108, 1162, 1322, 1394, 1424, 1468, 1500, 1630, 1654, 1668, 1684, 1694, 1840, 1886, 1980
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OFFSET
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1,1
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COMMENT
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Corresponding primes of form Sum[ Prime[k]^5, {k,1,n} ] are listed in A122126[n] = {32353461605953,9874820441996857,10821208357045699,...}.
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MATHEMATICA
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Select[Range[2000], PrimeQ[Sum[Prime[k]^5, {k, 1, #1}]]&]
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CROSSREFS
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Cf. A122103, A122126.
Sequence in context: A072430 A044317 A044698 this_sequence A062035 A043514 A044398
Adjacent sequences: A122122 A122123 A122124 this_sequence A122126 A122127 A122128
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KEYWORD
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nonn
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AUTHOR
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Alexander Adamchuk (alex(AT)kolmogorov.com), Aug 20 2006
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