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A224790
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a(n) = 3*9^n + 8.
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13
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11, 35, 251, 2195, 19691, 177155, 1594331, 14348915, 129140171, 1162261475, 10460353211, 94143178835, 847288609451, 7625597484995, 68630377364891, 617673396283955, 5559060566555531, 50031545098999715, 450283905890997371, 4052555153018976275
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OFFSET
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0,1
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COMMENTS
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Number of conjugacy classes in Ree group 2G2(3*9^n).
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LINKS
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FORMULA
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G.f.: 8/(1-x) + 3/(1-9*x).
a(n) = 10*a(n-1) - 9*a(n-2).
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MAPLE
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MATHEMATICA
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PROG
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(Sage) [3*9^n+8 for n in [0..20]]
(Magma) [8 + 3^(2*n+1): n in [0..20]]; // G. C. Greubel, Nov 12 2019
(GAP) List([0..20], n-> 8 + 3^(2*n+1)); # G. C. Greubel, Nov 12 2019
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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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