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Search: id:A063782
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| 3, 10, 32, 104, 336, 1088, 3520, 11392, 36864, 119296, 386048, 1249280, 4042752, 13082624, 42336256, 137003008, 443351040, 1434714112, 4642832384, 15024521216, 48620371968, 157338828800, 509159145472, 1647673606144
(list; graph; listen)
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OFFSET
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0,1
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COMMENT
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Ratio of successive terms approaches sqrt(5) + 1.
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FORMULA
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2^(n-1)*Fibonacci(n+3). - Vladeta Jovovic (vladeta(AT)Eunet.yu), Oct 25 2003
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MAPLE
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a := proc(n) option remember: if n=0 then RETURN(1) fi: if n=1 then RETURN(2) fi: 2*a(n-1) + 4*a(n-2); end: for n from 1 to 50 do printf(`%d, `, a(n)+a(n-1)) od:
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CROSSREFS
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Sequence in context: A134377 A077826 A033505 this_sequence A071718 A134952 A126183
Adjacent sequences: A063779 A063780 A063781 this_sequence A063783 A063784 A063785
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KEYWORD
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nonn
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AUTHOR
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Klaus E. Kastberg (kastberg(AT)hotkey.net.au), Aug 17 2001
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Sep 25 2001
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