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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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N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
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.
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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.
Adjacent sequences: A028331 A028332 A028333 this_sequence A028335 A028336 A028337
Sequence in context: A023118 A122197 A030718 this_sequence A083269 A097306 A102632
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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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