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A074618
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a(n) = 5^n + 9^n.
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0
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2, 14, 106, 854, 7186, 62174, 547066, 4861094, 43437346, 389373614, 3496550026, 31429887734, 282673677106, 2543086531454, 22882895970586, 205921649672774, 1853172776742466, 16677944639119694, 150098449994264746
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listen;
history;
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internal format)
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OFFSET
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0,1
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LINKS
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FORMULA
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G.f.: 1/(1-5*x) + 1/(1-9*x).
E.g.f.: e^(5*x) + e^(9*x). (End)
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MATHEMATICA
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Table[5^n + 9^n, {n, 0, 20}]
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CROSSREFS
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Cf. A000051, A034472, A052539, A034474, A062394, A034491, A062395, A062396, A007689, A063376, A063481, A074600..A074624.
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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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