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Search: id:A028334
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| A028334 |
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Differences between consecutive primes, divided by 2.
(Formerly N0030)
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+0
10
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| 1, 1, 2, 1, 2, 1, 2, 3, 1, 3, 2, 1, 2, 3, 3, 1, 3, 2, 1, 3, 2, 3, 4, 2, 1, 2, 1, 2, 7, 2, 3, 1, 5, 1, 3, 3, 2, 3, 3, 1, 5, 1, 2, 1, 6, 6, 2, 1, 2, 3, 1, 5, 3, 3, 3, 1, 3, 2, 1, 5, 7, 2, 1, 2, 7, 3, 5, 1, 2, 3, 4, 3, 3, 2, 3, 4, 2, 4, 5, 1, 5, 1, 3, 2, 3, 4, 2, 1, 2, 6, 4, 2, 4, 2, 3, 6, 1, 9, 3, 5, 3, 3, 1, 3
(list; graph; listen)
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OFFSET
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2,3
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COMMENT
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With an initial zero, gives the numbers of even numbers between two successive primes. - Giovanni Teofilatto (g.teofilatto(AT)tiscalinet.it), Nov 04 2005
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REFERENCES
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M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 870.
N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
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LINKS
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T. D. Noe, Table of n, a(n) for n=2..10000
M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards, Applied Math. Series 55, Tenth Printing, 1972 [alternative scanned copy].
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MATHEMATICA
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Table[ Floor[(Prime[n + 1] - Prime[n])/2], {n, 105}] (* Robert G. Wilson v *)
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CROSSREFS
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Cf. A005521.
Equals 2*A001223 for n>1.
Sequence in context: A023118 A122197 A030718 this_sequence A083269 A097306 A102632
Adjacent sequences: A028331 A028332 A028333 this_sequence A028335 A028336 A028337
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KEYWORD
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nonn
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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