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Search: id:A047870
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| A047870 |
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Smallest number that is not a sum of at most one power of each of the numbers 1 through n. |
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+0
2
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| 1, 2, 6, 15, 53, 204, 457, 12199, 110580, 765920, 29631246, 436070111
(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)=6 because 6 is the first number that is not of the form 1+2^i, 2^i or 1; a(3)=15 because 15 is smallest number not of form 1^i+2^j+3^k where i,j,k = -infinity or >=0.
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CROSSREFS
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Cf. A047871.
Sequence in context: A138574 A045628 A127383 this_sequence A027287 A003268 A009455
Adjacent sequences: A047867 A047868 A047869 this_sequence A047871 A047872 A047873
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KEYWORD
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nonn,nice
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AUTHOR
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Nathan M. Simpson (ntsimp(AT)concentric.net)
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EXTENSIONS
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Corrected and extended by David W. Wilson (davidwwilson(AT)comcast.net)
Two more terms from Don Reble (djr(AT)nk.ca), Oct 26 2001
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