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34, 142, 574, 2302, 9214, 36862, 147454, 589822, 2359294, 9437182, 37748734, 150994942, 603979774, 2415919102, 9663676414, 38654705662, 154618822654, 618475290622, 2473901162494, 9895604649982, 39582418599934, 158329674399742, 633318697598974, 2533274790395902
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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FORMULA
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a(n) = 5*a(n-1) - 4*a(n-2).
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MATHEMATICA
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CoefficientList[Series[(34 - 28 x )/((1 - x) (1 - 4 x)), {x, 0, 30}], x] (* Vincenzo Librandi, May 03 2014 *)
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PROG
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(Magma) I:=[34, 142]; [n le 2 select I[n] else 5*Self(n-1)-4*Self(n-2): n in [1..50]]; // Vincenzo Librandi, Feb 22 2012
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CROSSREFS
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KEYWORD
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nonn,easy
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AUTHOR
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STATUS
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approved
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