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A155639
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a(n) = 6^n-5^n+1^n.
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21
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1, 2, 12, 92, 672, 4652, 31032, 201812, 1288992, 8124572, 50700552, 313968932, 1932641712, 11839990892, 72260648472, 439667406452, 2668522016832, 16163719991612, 97745259402792, 590286253682372, 3560791008422352
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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.: 1/(1-6*x)-1/(1-5*x)+1/(1-x).
E.g.f.: e^(6*x)-e^(5*x)+e^x.
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MAPLE
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MATHEMATICA
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LinearRecurrence[{12, -41, 30}, {1, 2, 12}, 30] (* Harvey P. Dale, Aug 23 2016 *)
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PROG
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CROSSREFS
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Cf. A155624, A155625, A155626, A155627, A155628, A155629, A155630, A155631, A155632, A155633, A155634, A155635, A155636, A155637, A155638.
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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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