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Search: id:A109454
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| A109454 |
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Sum of non-Fibonacci numbers between successive Fibonacci numbers: {(F(n) +1),(F(n) +2), +...+ (F(n+1) -1)}. |
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+0
1
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| 0, 0, 0, 0, 4, 13, 42, 119, 330, 890, 2376, 6291, 16588, 43615, 114492, 300236, 786828, 2061233, 5398470, 14136759, 37015990, 96917974, 253748880, 664346375, 1739318904, 4553656703, 11921726232, 31211643384, 81713400340, 213928875445
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OFFSET
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0,5
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FORMULA
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a(n) = Fibonacci(n+2)*(Fibonacci(n-1)-1)/2, n>1. - Vladeta Jovovic (vladeta(AT)Eunet.yu), Aug 27 2005
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EXAMPLE
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F(5) = F(4) +1 = 4.
F(6) = (F(5) +1)+( F(5) +2) = 6+7 = 13.
F(7) = 9+10+11+12 = 42.
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CROSSREFS
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Cf. A006002.
Sequence in context: A085507 A121654 A036366 this_sequence A000640 A010919 A022029
Adjacent sequences: A109451 A109452 A109453 this_sequence A109455 A109456 A109457
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KEYWORD
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nonn
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Aug 27 2005
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EXTENSIONS
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More terms from Frank Adams-Watters (FrankTAW(AT)Netscape.net), Jun 06 2006
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