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A014794
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Squares of even octagonal numbers.
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4
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0, 64, 1600, 9216, 30976, 78400, 166464, 313600, 541696, 876096, 1345600, 1982464, 2822400, 3904576, 5271616, 6969600, 9048064, 11560000, 14561856, 18113536, 22278400, 27123264, 32718400, 39137536, 46457856, 54760000
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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.: 64*x*(1+20*x+29*x^2+4*x^3)/(1-x)^5. - Colin Barker, Jan 06 2012
E.g.f.: 16*exp(x)*x*(4 + 46*x + 48*x^2 + 9*x^3). - Stefano Spezia, Apr 16 2022
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MATHEMATICA
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LinearRecurrence[{5, -10, 10, -5, 1}, {0, 64, 1600, 9216, 30976}, 30] (* Harvey P. Dale, Nov 27 2015 *)
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PROG
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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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EXTENSIONS
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STATUS
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approved
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