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Search: id:A135992
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| A135992 |
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Positive Fibonacci numbers swapped in pairs. |
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+0
3
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| 1, 1, 3, 2, 8, 5, 21, 13, 55, 34, 144, 89, 377, 233, 987, 610, 2584, 1597, 6765, 4181, 17711, 10946, 46368, 28657, 121393, 75025, 317811, 196418, 832040, 514229, 2178309, 1346269, 5702887, 3524578, 14930352, 9227465, 39088169, 24157817
(list; graph; listen)
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OFFSET
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1,3
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FORMULA
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a(2n-1)=fibonacci(2n), a(2n)=fibonacci(2n-1). a(2n-1)=a(2n-2)+2a(2n-3), a(2n)=a(2n-1)-a(2n-3), a(1)=a(2)=1. - Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 22 2008
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MAPLE
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a[1]:=1: a[2]:=1: for n from 2 to 20 do a[2*n-1]:=a[2*n-2]+2*a[2*n-3]: a[2*n]:=a[2*n-1]-a[2*n-3] end do: seq(a[n], n=1..40); - Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 22 2008
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CROSSREFS
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Sequence in context: A130921 A125980 A126320 this_sequence A132827 A126315 A125976
Adjacent sequences: A135989 A135990 A135991 this_sequence A135993 A135994 A135995
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KEYWORD
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nonn
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AUTHOR
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Paul Curtz (bpcrtz(AT)free.fr), Mar 03 2008
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EXTENSIONS
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More terms from Emeric Deutsch (deutsch(AT)duke.poly.edu), Mar 22 2008
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