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Search: id:A092991
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| A092991 |
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Least product of the parts of the partitions of n where that product has the maximum number of divisors. |
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+0
2
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| 1, 1, 2, 2, 4, 6, 6, 12, 12, 24, 36, 48, 60, 60, 120, 180, 240, 360, 360, 720, 1080, 1440, 2160, 2880, 2520, 6480, 5040, 7560, 10080, 15120, 20160, 30240, 45360, 60480, 75600, 120960, 151200, 226800, 302400, 453600, 604800, 907200, 1209600, 1814400
(list; graph; listen)
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OFFSET
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0,3
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COMMENT
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Let P be the set of all products of partitions of n and t = max_{m in P} tau(m). Then a(n) = min_{m in P and tau(m) = t} m. Note that the sequence is not monotonic; the first decrease is a(26) = 5040 < 6480 = a(25) and the second is a(49) = 3326400 < 10886400 = a(48). - Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jun 14 2006
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EXAMPLE
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a(9) = 24 corresponding to the partition (2,2,2,3).
a(8) = 12 corresponding to the partition (1,3,4). Another partition (3,3,2)gives a product 18 with same number of divisors 6 but 18>12 hence a(8) = 12.
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CROSSREFS
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Cf. A092990.
Cf. A000005, A118851.
Sequence in context: A055388 A065457 A000784 this_sequence A102425 A086536 A053045
Adjacent sequences: A092988 A092989 A092990 this_sequence A092992 A092993 A092994
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 28 2004
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EXTENSIONS
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Corrected and extended by Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jun 14 2006
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