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Search: id:A125722
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| A125722 |
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Greatest product of two numbers made up together of digits 0 to n once. |
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+0
2
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| 0, 20, 630, 13120, 224120, 3420020, 48460020, 651939020, 8439739020
(list; graph; listen)
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OFFSET
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1,2
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EXAMPLE
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The greatest product of two numbers using digits 0 through 7,for instance,occurs when the difference between them is least,(since X*Y={(X+Y)^2 - (X-Y)^2}/4),i.e., when the product equals 7420*6531=48640020=a(7).
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CROSSREFS
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Sequence in context: A015268 A059420 A129906 this_sequence A006410 A159874 A109894
Adjacent sequences: A125719 A125720 A125721 this_sequence A125723 A125724 A125725
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KEYWORD
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fini,full,nonn
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AUTHOR
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Lekraj Beedassy (blekraj(AT)yahoo.com), Feb 01 2007
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