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A016845
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a(n) = (4n+3)^9.
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2
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19683, 40353607, 2357947691, 38443359375, 322687697779, 1801152661463, 7625597484987, 26439622160671, 78815638671875, 208728361158759, 502592611936843, 1119130473102767, 2334165173090451, 4605366583984375, 8662995818654939, 15633814156853823, 27206534396294947
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listen;
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OFFSET
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0,1
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LINKS
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Index entries for linear recurrences with constant coefficients, signature (10,-45,120,-210,252,-210,120,-45,10,-1).
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FORMULA
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Sum_{n>=0} 1/a(n) = 511*zeta(9)/1024 - 277*Pi^9/16515072. (End)
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MATHEMATICA
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Table[(4*n + 3)^9, {n, 0, 20}] (* Amiram Eldar, Apr 24 2023 *)
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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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