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Search: id:A047871
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| A047871 |
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a(n) = smallest number > a(n-1) that is not a sum of exactly one power of each of the numbers 1 through n. |
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+0
2
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| 1, 2, 4, 7, 17, 54, 358, 1859, 13911, 175164, 3480256, 97050825, 1947896985
(list; graph; listen)
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OFFSET
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0,2
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EXAMPLE
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a(2)=4 because 4 is the first number >2 that is not of the form 1^i+2^j; a(3)=7 because 7 is smallest number >4 not of form 1^i+2^j+3^k.
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CROSSREFS
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Cf. A047870.
Sequence in context: A026775 A027238 A076894 this_sequence A103032 A101569 A101805
Adjacent sequences: A047868 A047869 A047870 this_sequence A047872 A047873 A047874
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KEYWORD
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nonn,nice
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AUTHOR
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N. J. A. Sloane (njas(AT)research.att.com).
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EXTENSIONS
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More terms from David W. Wilson (davidwwilson(AT)comcast.net). Two more terms from Don Reble (djr(AT)nk.ca), Oct 27 2001
a(12) from Donovan Johnson (donovan.johnson(AT)yahoo.com), Oct 07 2009
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