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Search: id:A141561
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| A141561 |
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Primes of the form (7*n-p(n)), where p(n)=n-th prime. |
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+0
1
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| 5, 11, 29, 37, 41, 47, 59, 79, 89, 97, 101, 103, 107, 113, 113, 127, 139, 137, 139, 149, 149, 151, 167, 167, 157, 163, 179, 179, 181, 181, 181, 181, 181, 179, 173, 181, 179, 191, 181, 179, 181, 179, 179, 191, 191, 193, 193, 179, 181, 179, 173, 179, 173, 179
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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If n=1, then 7*1-p(1)=7-2=5=a(1).
If n=2, then 7*2-p(2)=14-3=11=a(2).
If n=3, then 7*3-p(3)=21-5=16 (composite).
If n=4, then 7*4-p(4)=28-7=21 (composite).
If n=5, then 7*5-p(5)=35-11=25 (composite).
If n=6, then 7*6-p(6)=42-13=29=a(3).
If n=7, then 7*7-p(7)=49-17=32 (composite).
If n=8, then 7*8-p(8)=56-19=37=a(4).
If n=9, then 7*9-p(9)=63-23=40 (composite).
If n=10, then 7*10-p(10)=70-29=41=a(5).
If n=11, then 7*11-p(11)=77-31=46 (composite).
If n=12, then 7*12-p(12)=84-37=47=a(6).
If n=13, then 7*13-p(13)=91-41=50 (composite).
If n=14, then 7*14-p(14)=98-43=55 (composite).
If n=15, then 7*15-p(15)=105-47=58 (composite).
If n=16, then 7*16-p(16)=112-53=59=a(7), etc.
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CROSSREFS
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Cf. A000040.
Sequence in context: A048655 A041671 A095053 this_sequence A019345 A049489 A141785
Adjacent sequences: A141558 A141559 A141560 this_sequence A141562 A141563 A141564
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KEYWORD
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nonn
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Aug 14 2008
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EXTENSIONS
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Edited, corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 19 2008
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