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A081593
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Third row of Pascal-(1,7,1) array A081582.
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3
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1, 17, 97, 241, 449, 721, 1057, 1457, 1921, 2449, 3041, 3697, 4417, 5201, 6049, 6961, 7937, 8977, 10081, 11249, 12481, 13777, 15137, 16561, 18049, 19601, 21217, 22897, 24641, 26449, 28321, 30257, 32257, 34321, 36449, 38641, 40897, 43217, 45601
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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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a(n) = 1-16*n+32*n^2.
G.f.: (1+7*x)^2/(1-x)^3.
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MATHEMATICA
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CoefficientList[Series[(1 + 7 x)^2 / (1 - x)^3, {x, 0, 40}], x] (* Vincenzo Librandi, Aug 09 2013 *)
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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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