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Search: id:A117667
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| A117667 |
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a(n) = n^n-n^(n-1)-n^(n-2)-n^(n-3)-...-n^3-n^2-n. |
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+0
1
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| 1, 2, 15, 172, 2345, 37326, 686287, 14380472, 338992929, 8888888890, 256780503551, 8105545862052, 277635514376233, 10257237069745862, 406615755353655135, 17216961135462248176, 775537745518440716417
(list; graph; listen)
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OFFSET
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1,2
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FORMULA
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a(n)=n^n-n^(n-1)-n^(n-2)-n^(n-3)-...-n^3-n^2-n
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EXAMPLE
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a(3)=3^3-3^2-3=27-9-3=15.
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MAPLE
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a:=n->n^n-sum(n^j, j=1..n-1): seq(a(n), n=1..19); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Apr 16 2006
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CROSSREFS
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Sequence in context: A124548 A139085 A140809 this_sequence A036080 A121427 A099709
Adjacent sequences: A117664 A117665 A117666 this_sequence A117668 A117669 A117670
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KEYWORD
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nonn
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AUTHOR
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Luc Stevens (lms022(AT)yahoo.com), Apr 11 2006
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