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A060271
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Difference between smallest prime following and largest prime preceding 2*(nth prime).
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0
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2, 4, 4, 4, 6, 6, 4, 4, 6, 6, 6, 4, 6, 8, 4, 14, 14, 6, 10, 10, 6, 4, 6, 4, 12, 12, 12, 12, 4, 6, 6, 6, 4, 14, 14, 4, 14, 6, 10, 6, 8, 4, 6, 8, 4, 10, 6, 8, 4, 4, 12, 8, 4, 12, 18, 18, 6, 10, 6, 6, 10, 4, 12, 12, 10, 12, 4, 10, 10, 8, 10, 6, 8, 4, 8, 14, 10, 12, 10, 10, 14, 4, 14, 4, 4, 20, 8
(list; graph; refs; listen; history; internal format)
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OFFSET
| 2,1
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EXAMPLE
| n=1: p(1)=2, 2p(1)=4 is between 3 and 5, their difference is 2=a(1); n=6: p(6)=13, 2p(6)=26 is between 23 and 29 and their difference is 6=a(6).
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MAPLE
| with(numtheory): [seq(nextprime(2*ithprime(j))-prevprime(2*ithprime(j)), j=2...256)];
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CROSSREFS
| Cf. A059786-A059790, A013633, A058043, A058249, A058044, A060267, A001223.
Sequence in context: A035633 A160803 A084291 * A073806 A060849 A130819
Adjacent sequences: A060268 A060269 A060270 * A060272 A060273 A060274
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KEYWORD
| nonn
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AUTHOR
| Labos E. (labos(AT)ana.sote.hu), Mar 23 2001
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