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A117614
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a(0)=1, a(n)=4a(n-1)+2 for n odd, a(n)=4a(n-1) for n even.
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1, 6, 24, 98, 392, 1570, 6280, 25122, 100488, 401954, 1607816, 6431266, 25725064, 102900258, 411601032, 1646404130, 6585616520, 26342466082, 105369864328, 421479457314, 1685917829256, 6743671317026, 26974685268104
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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REFERENCES
| L. Rosenfeld, Nuclear Forces, section II, Interscience, New York, 1948, p 202.
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MAPLE
| a:=proc(n) if n=0 then 1 elif n mod 2 = 1 then 4*a(n-1)+2 else 4*a(n-1) fi end: seq(a(n), n=0..25);
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MATHEMATICA
| b[0] := 1 b[1] := 6 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
| Sequence in context: A002023 A037505 A048179 * A037688 A126393 A120583
Adjacent sequences: A117611 A117612 A117613 * A117615 A117616 A117617
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KEYWORD
| nonn
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AUTHOR
| Roger L. Bagula (rlbagulatftn(AT)yahoo.com), Apr 07 2006
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EXTENSIONS
| Edited by N. J. A. Sloane (njas(AT)research.att.com), Apr 16 2006
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