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Search: id:A107580
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| A107580 |
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Numbers n such that (n + prime(n)) and (n+1 + prime(n+1)) are divisible by 5. |
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+0
1
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| 27, 62, 63, 78, 88, 93, 112, 117, 122, 131, 136, 137, 146, 147, 162, 163, 226, 283, 287, 348, 371, 382, 391, 401, 402, 447, 483, 526, 527, 532, 533, 547, 552, 612, 626, 641, 642, 678, 687, 688, 718, 727, 766, 806, 877, 888, 986, 987, 992, 996, 1002, 1011, 1022
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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For some values of n, e.g., 62, 132, 146, 162, also (n+2 + prime(n+2)) is divisible by 5.
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MATHEMATICA
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Select[Range[5000], Mod[Prime[ # ]+#, 5]+Mod[Prime[ #+1]+#+1, 5]==0&]
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CROSSREFS
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Sequence in context: A080864 A039459 A157500 this_sequence A138610 A128530 A044129
Adjacent sequences: A107577 A107578 A107579 this_sequence A107581 A107582 A107583
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KEYWORD
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easy,nonn
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AUTHOR
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Zak Seidov (zakseidov(AT)yahoo.com), Jun 10 2005
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