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Search: id:A142345
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| A142345 |
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Primes of the form (p(n)+r(n))/3, where p(n)=n-th prime and r(n)=n-th nonprime. |
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+0
1
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| 3, 23, 29, 37, 41, 47, 61, 67, 83, 103, 113, 149, 157, 167, 193, 269, 277, 281, 331, 347, 439, 521, 569, 593, 677, 733, 823, 827, 877, 911, 1019, 1061, 1097, 1117, 1153, 1217, 1259, 1289, 1381, 1433, 1447, 1489, 1499, 1553, 1607, 1637, 1693, 1699, 1733, 1801
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OFFSET
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1,1
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EXAMPLE
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If n=3, then (p(3)+r(3))/3=(5+4)/3=3=a(1).
If n=15, then (p(15)+r(15))/3=(47+22)/3=23=a(2).
If n=18, then (p(18)+r(18))/3=(61+26)/3=29=a(3).
If n=22, then (p(22)+r(22))/3=(79+32)/3=37=a(4).
If n=24, then (p(24)+r(24))/3=(89+34)/3=41=a(5), etc.
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CROSSREFS
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Cf. A000040, A141468.
Sequence in context: A103361 A136090 A032688 this_sequence A133023 A098946 A058302
Adjacent sequences: A142342 A142343 A142344 this_sequence A142346 A142347 A142348
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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), Sep 19 2008
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EXTENSIONS
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167 inserted, 347 inserted and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Nov 03 2008
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