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Search: id:A141559
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| A141559 |
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Primes of form (p(n)-r(n)), where A141468(n)=r(n)=n-th nonprime and p(n)=n-th prime. |
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+0
1
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| 2, 2, 3, 7, 7, 19, 29, 43, 43, 47, 71, 83, 101, 113, 193, 197, 229, 241, 271, 283, 293, 311, 311, 347, 383, 439, 457, 463, 491, 491, 499, 523, 587, 619, 643, 683, 733, 797, 827, 827, 857, 863, 919, 991, 1021, 1031, 1091, 1151, 1187, 1289, 1367, 1367, 1549, 1567
(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 p(1)-r(1)=2-0=2=a(1).
If n=2, then p(2)-r(2)=3-1=2=a(2).
If n=3, then p(3)-r(3)=5-4=1 (nonprime).
If n=4, then p(4)-r(4)=7-6=1 (nonprime).
If n=5, then p(5)-r(5)=11-8=3=a(3).
If n=6, then p(6)-r(6)=13-9=4 (composite).
If n=7, then p(7)-r(7)=17-10=7=a(4).
If n=8, then p(8)-r(8)=19-12=7=a(5).
If n=9, then p(9)-r(9)=23-14=9 (composite).
If n=10, then=p(10)-r(10)=29-15=14 (composite).
If n=11, then p(11)-r(11)=31-16=15 (composite).
If n=12, then p(12)-r(12)=37--18=19=a(6).
If n=13, then p(13)-r(13)=41-20=21 (composite).
If n=14, then p(14)-r(14)=43-21=22 (composite).
If n=15, then p(15)-r(15)=47-22=25 (composite).
If n=16, then p(16)-r(16)=53-24=29=a(7), etc.
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CROSSREFS
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Cf. A000040, A141468.
Sequence in context: A083702 A108041 A095017 this_sequence A043550 A036060 A087384
Adjacent sequences: A141556 A141557 A141558 this_sequence A141560 A141561 A141562
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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 and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Aug 19 2008
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