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A145340
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a(n) = the maximum of d(p(n)-1) and d(p(n)+1), where d(m) is the number of divisors of m and p(n) is the n-th prime.
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1
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2, 3, 4, 4, 6, 6, 6, 6, 8, 8, 8, 9, 8, 8, 10, 8, 12, 12, 8, 12, 12, 10, 12, 12, 12, 9, 8, 12, 12, 10, 12, 12, 8, 12, 12, 12, 12, 10, 16, 8, 18, 18, 14, 14, 12, 12, 16, 12, 12, 12, 12, 20, 20, 18, 9, 16, 16, 16, 12, 16, 8, 12, 12, 16, 16, 8, 16, 20, 12, 12, 12, 24, 10, 12, 16, 16, 16
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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MATHEMATICA
| Table[Max[DivisorSigma[0, Prime[n]-1], DivisorSigma[0, Prime[n]+1]], {n, 1, 100}] [From Stefan Steinerberger (stefan.steinerberger(AT)gmail.com), Oct 11 2008]
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CROSSREFS
| Cf. A145339, A008328, A008329, A067889, A103664, A103665
Sequence in context: A126012 A096908 A162684 * A160680 A061984 A063208
Adjacent sequences: A145337 A145338 A145339 * A145341 A145342 A145343
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KEYWORD
| nonn
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AUTHOR
| Leroy Quet Oct 08 2008
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EXTENSIONS
| More terms from Stefan Steinerberger (stefan.steinerberger(AT)gmail.com) and Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 11 2008
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