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Search: id:A000423
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| A000423 |
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a(n+1) is smallest number > a(n) of form a(i)a(j), i<j<n. |
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+0
4
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| 2, 3, 6, 12, 18, 24, 36, 48, 54, 72, 96, 108, 144, 162, 192, 216, 288, 324, 384, 432, 486, 576, 648, 768, 864, 972, 1152, 1296, 1458, 1536, 1728, 1944, 2304, 2592, 2916, 3072, 3456, 3888, 4374, 4608, 5184, 5832, 6144, 6912, 7776, 8748, 9216, 10368, 11664
(list; graph; listen)
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OFFSET
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1,1
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REFERENCES
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Amarnath Murthy, The sum of the reciprocals of the Smarandache multiplicative sequence, (to be published in Smarandache Notions Journal).
F. Smarandache, "Properties of the Numbers", University of Craiova Archives, 1975; Arizona State University Special Collections, Tempe, AZ
M. Myers, Smarandache Multiplicative Numbers, in Memorables 1998, Bristol Banner Books, Bristol, p. 37, 1998.
F. Smarandache, Sequences of Numbers Involved in Unsolved Problems (over 300 sequences), Hexis, Phoenix, 2006.
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LINKS
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M. L. Perez et al., eds., Smarandache Notions Journal
F. Smarandache, Sequences of Numbers Involved in Unsolved Problems.
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FORMULA
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Sequence contains 2, 3 and all numbers of form 2^a*3^b where a >= 1 and b >= 1 (David W. Wilson (davidwwilson(AT)comcast.net)).
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CROSSREFS
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Adjacent sequences: A000420 A000421 A000422 this_sequence A000424 A000425 A000426
Sequence in context: A125867 A032727 A093687 this_sequence A133933 A007335 A103070
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KEYWORD
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nonn,easy
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AUTHOR
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R. Muller
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EXTENSIONS
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More terms from David W. Wilson (davidwwilson(AT)comcast.net) Aug 15 1996.
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