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Search: id:A141867
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| A141867 |
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Primes of the form (n/2+p(n-1)-p(n))/2, where p(n)=n-th prime. |
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+0
1
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| 3, 3, 5, 7, 11, 13, 17, 17, 23, 31, 29, 37, 43, 47, 53, 61, 61, 61, 71, 79, 83, 101, 103, 107, 113, 137, 137, 139, 151, 163, 167, 163, 167, 173, 173, 179, 181, 199, 211, 211, 223, 229, 233, 233, 239, 233, 251, 251, 263, 263, 283, 277, 307, 307, 313, 317, 313, 337, 347, 347
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Entries may be repeated and are shown in the order of increasing generator n.
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EXAMPLE
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If n=20, then (20/2+p(20-1)-p(20))/2=(10+67-71)/2=3=a(1).
If n=24, then (24/2+p(24-1)-p(24))/2=(12+83-89)/2=3=a(2).
If n=28, then (28/2+p(28-1)-p(28))/2=(14+103-107)/2=5=a(3).
If n=40, then (40/2+p(40-1)-p(40))/2=(20+167-173)/2=7=a(4).
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CROSSREFS
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Cf A000040.
Sequence in context: A086341 A128424 A129758 this_sequence A001588 A107029 A142712
Adjacent sequences: A141864 A141865 A141866 this_sequence A141868 A141869 A141870
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KEYWORD
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nonn,less
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AUTHOR
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Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Sep 16 2008
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EXTENSIONS
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Corrected and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 26 2008
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