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A083299
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a(n) = (4*6^n + (-4)^n)/5.
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3
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1, 4, 32, 160, 1088, 6016, 38144, 220672, 1356800, 8009728, 48582656, 289398784, 1744781312, 10435133440, 62745018368, 375933239296, 2257746919424, 13537891581952, 81261709230080, 487432816427008, 2925146654375936
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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a(n) = (4*6^n + (-4)^n)/5.
G.f.: (1+2*x)/((1-6*x)*(1+4*x)).
E.g.f.: (4*exp(6*x) + exp(-4*x))/5.
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PROG
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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STATUS
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approved
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