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Search: id:A066286
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| A066286 |
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For even n>=4, let f(n)=A066285(n/2) be the minimal difference between primes p and q whose sum is n. This sequence contains the successive maxima of f. |
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+0
4
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| 0, 2, 6, 18, 30, 36, 42, 54, 66, 78, 84, 90, 96, 150, 174, 186, 234, 240, 270, 276, 336, 366, 420, 456, 600, 666, 738, 786, 906, 1050, 1242, 1440, 1620, 1692, 2172, 2562, 2610, 3030, 3180, 3234, 3444, 3588, 3666, 3702, 4020, 4128, 4170, 4224, 4434, 4704, 5508, 5568, 6678, 6858, 8790, 8976, 10782
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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All terms appear to be divisible by 6, except the first two.
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MATHEMATICA
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f[n_] := For[p=n/2, True, p--, If[PrimeQ[p]&&PrimeQ[n-p], Return[n-2p]]]; For[n=4; max=-1, True, n+=2, If[f[n]>max, Print[max=f[n]]]]
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CROSSREFS
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The corresponding values of n are in A065978.
Adjacent sequences: A066283 A066284 A066285 this_sequence A066287 A066288 A066289
Sequence in context: A127257 A050832 A032649 this_sequence A034881 A064842 A101695
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KEYWORD
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nonn
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AUTHOR
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Dean Hickerson (dean(AT)math.ucdavis.edu), Dec 12, 2001
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EXTENSIONS
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a(51)-a(55) from Gilmar Rodriguez (Gilmar.Rodriguez(AT)nwfwmd.state.fl.us), Jun 16 2005.
a(56) from Robert G. Wilson v (rgwv(AT)rgwv.com), Jun 27 2005
a(57) from Gilmar Rodriguez (Gilmar.Rodriguez(AT)nwfwmd.state.fl.us), Jul 07 2005
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