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Search: id:A117616
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| A117616 |
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a(0)=0, a(n)=4a(n-1)+2 for n odd, a(n)=4a(n-1) for n even. |
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+0
2
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| 0, 2, 8, 34, 136, 546, 2184, 8738, 34952, 139810, 559240, 2236962, 8947848, 35791394, 143165576, 572662306, 2290649224, 9162596898, 36650387592, 146601550370, 586406201480, 2345624805922, 9382499223688, 37529996894754
(list; graph; listen)
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OFFSET
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0,2
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REFERENCES
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L. Rosenfeld, Nuclear Forces, section II, Interscience, New York, 1948, p 202
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MAPLE
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a:=proc(n) if n=0 then 0 elif n mod 2 = 1 then 4*a(n-1)+2 else 4*a(n-1) fi end: seq(a(n), n=0..23);
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MATHEMATICA
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b[0] := 0 b[1] := 2 b[n_?EvenQ] := b[n] = 4*b[n - 1] b[n_?OddQ] := b[n] = 4*b[n - 1] + 2 a = Table[b[n], {n, 0, 25}]
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CROSSREFS
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Sequence in context: A026577 A111643 A000163 this_sequence A014445 A113440 A034999
Adjacent sequences: A117613 A117614 A117615 this_sequence A117617 A117618 A117619
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KEYWORD
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nonn
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AUTHOR
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Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Apr 07 2006
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EXTENSIONS
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Edited by njas, Apr 16 2006
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