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0, 6, 84, 936, 9744, 98976, 995904, 9983616, 99934464, 999737856, 9998951424, 99995805696, 999983222784, 9999932891136, 99999731564544, 999998926258176, 9999995705032704, 99999982820130816, 999999931280523264, 9999999725122093056, 99999998900488372224
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listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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G.f.: 6*x/((1-4*x)*(1-10*x)).
a(n) = 14*a(n-1) - 40*a(n-2).
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MATHEMATICA
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Table[10^n - 4^n, {n, 0, 25}] (* or *) CoefficientList[Series[(6 x) / ((1 - 4 x) (1 - 10 x)), {x, 0, 30}], x]
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PROG
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(Magma) [10^n-4^n: n in [0..30]];
(PARI) vector(20, n, 10^(n-1)-4^(n-1)) \\ Derek Orr, Oct 05 2014
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CROSSREFS
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Cf. similar sequences listed in A248337.
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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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