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A078265
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Integer part of the geometric mean of all the distinct numbers formed by permuting the digits of concatenation of numbers from 1 to n.
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1
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OFFSET
| 1,2
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COMMENTS
| For n < 10 there are n! distinct numbers. a(4) = Floor[1234*1243*1324*1342*1423*1432*...*4312*4321)^(1/24)]
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EXAMPLE
| a(3) = Floor[{123*132*213*231*312*321)^(1/6)] = 207
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MATHEMATICA
| a[n_] := Floor[ (Times @@ FromDigits /@ Permutations[Range[n]])^(1/n!) ]; Table[a[n], {n, 1, 10}] - Ryan Propper (rpropper(AT)stanford.edu), Jul 21 2006
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CROSSREFS
| Cf. A071268, A078266.
Sequence in context: A061637 A063906 A194481 * A089138 A051813 A028230
Adjacent sequences: A078262 A078263 A078264 * A078266 A078267 A078268
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KEYWORD
| base,more,nonn
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AUTHOR
| Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Nov 24 2002
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EXTENSIONS
| More terms from Ryan Propper (rpropper(AT)stanford.edu), Jul 21 2006
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