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Search: id:A158569
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| A158569 |
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a(n)=Sum_{i=1..F(n)} F(i). n>=1. F(k) is A000045, Fibonacci numbers. |
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+0
1
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| 1, 1, 2, 4, 12, 54, 609, 28656, 14930351, 365435296161, 4660046610375530308, 1454489111232772683678306641952, 5789092068864820527338372482892113982249794889764
(list; graph; listen)
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OFFSET
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1,3
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COMMENT
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a(14) has 79 digits. [From Emeric Deutsch (deutsch(AT)duke.poly.edu), Apr 05 2009]
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MAPLE
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with(combinat); a := proc (n) options operator, arrow: add(fibonacci(i), i = 1 .. fibonacci(n)) end proc: seq(a(n), n = 1 .. 13); [From Emeric Deutsch (deutsch(AT)duke.poly.edu), Apr 05 2009]
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CROSSREFS
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Cf. A000045
Sequence in context: A030831 A058767 A075876 this_sequence A020106 A099928 A000568
Adjacent sequences: A158566 A158567 A158568 this_sequence A158570 A158571 A158572
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KEYWORD
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easy,nonn
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AUTHOR
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Ctibor O. Zizka (c.zizka(AT)email.cz), Mar 21 2009
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Apr 05 2009
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