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Search: id:A141560
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| A141560 |
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Nonprimes of form (p(n)-r(n)), where A141468(n)=r(n)=n-th nonprime and p(n)=n-th prime. |
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| 1, 1, 4, 9, 14, 15, 21, 22, 25, 34, 35, 40, 50, 55, 62, 65, 65, 68, 69, 86, 91, 91, 100, 106, 111, 118, 123, 124, 133, 133, 135, 136, 147, 158, 161, 161, 164, 169, 169, 177, 182, 187, 192, 200, 201, 209, 222, 225, 226, 246, 255, 256, 259, 264, 275, 280, 287, 296
(list; graph; listen)
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OFFSET
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1,3
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EXAMPLE
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If n=1, then p(1)-r(1)=2-0=2 (prime).
If n=2, then p(2)-r(2)=3-1=2 (prime).
If n=3, then p(3)-r(3)=5-4=1=a(1).
If n=4, then p(4)-r(4)=7-6=1=a(2).
If n=5, then p(5)-r(5)=11-8=3 (prime).
If n=6, then p(6)-r(6)=13-9=4=a(3).
If n=7, then p(7)-r(7)=17-10=7 (prime).
If n=8, then p(8)-r(8)=19-12=7 (prime).
If n=9, then p(9)-r(9)=23-14=9=a(4).
If n=10, then=p(10)-r(10)=29-15=14=a(5).
If n=11, then p(11)-r(11)=31-16=15=a(6).
If n=12, then p(12)-r(12)=37--18=19 (prime).
If n=13, then p(13)-r(13)=41-20=21=a(7).
If n=14, then p(14)-r(14)=43-21=22=a(8).
If n=15, then p(15)-r(15)=47-22=25=a(9).
If n=16, then p(16)-r(16)=53-24=29 (prime).
If n=17, then p(17)-r(17)=59-25=34=a(10), etc.
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CROSSREFS
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Cf. A000040, A141468.
Sequence in context: A102776 A140343 A091880 this_sequence A071864 A050986 A034259
Adjacent sequences: A141557 A141558 A141559 this_sequence A141561 A141562 A141563
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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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