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Search: id:A111155
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| A111155 |
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Smallest constant of a multiplicative bimagic square of order n. |
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+0
1
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| 120, 4320, 277200, 25945920, 3632428800, 670442572800, 140792940288000
(list; graph; listen)
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OFFSET
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3,1
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COMMENT
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Clearly this is a number k that has n^2 distinct factors multiplying to give k^n. For all the values checked so far, it is the smallest such number.
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LINKS
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Christian Boyer, The smallest possible multiplicative magic squares .
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EXAMPLE
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Examples of a 3 X 3 multiplicative bimagic square with constant 120 are
01 12 10
15 02 04
08 05 03
--------
01 20 06
12 02 05
10 03 04
--------
01 20 06
08 03 05
15 02 04
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CROSSREFS
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Sequence in context: A000514 A055360 A001807 this_sequence A140907 A072419 A031145
Adjacent sequences: A111152 A111153 A111154 this_sequence A111156 A111157 A111158
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KEYWORD
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nonn
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AUTHOR
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Luke Pebody (ltp1000(AT)cam.ac.uk), Oct 20 2005
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EXTENSIONS
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More terms from David W. Wilson (davidwwilson(AT)comcast.net), Feb 02 2006
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