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A066066
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a(n) = prime(2*n) - prime(n)*2.
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10
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-1, 1, 3, 5, 7, 11, 9, 15, 15, 13, 17, 15, 19, 21, 19, 25, 21, 29, 29, 31, 35, 35, 33, 45, 35, 37, 45, 49, 53, 55, 39, 49, 43, 59, 51, 57, 59, 57, 63, 63, 63, 71, 61, 71, 69, 81, 69, 57, 67, 83, 91, 91, 95, 91, 87, 87, 81, 99, 93, 97, 107, 97, 87, 97, 107, 109, 95, 95, 93, 111, 115, 109, 105, 111, 105, 115, 109, 117, 127, 123, 115
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,3
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COMMENTS
| a(n) = A022457(n) for n > 1.
a(n)=A031215(n)-A100484(n)=A072473(n)-A000040(n); see A179740 for primes. [From Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jul 25 2010]
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LINKS
| Harry J. Smith, Table of n, a(n) for n=1,...,1000
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PROG
| (PARI) { for (n = 1, 1000, a=prime(2*n) - prime(n)*2; write("b066066.txt", n, " ", a) ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Nov 09 2009]
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CROSSREFS
| Sequence in context: A031255 A174839 A022457 * A112070 A123252 A066168
Adjacent sequences: A066063 A066064 A066065 * A066067 A066068 A066069
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KEYWORD
| sign
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AUTHOR
| Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Dec 01 2001
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