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A082035
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a(n) = (4n^2+2n+1) * n!.
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2
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1, 7, 42, 258, 1752, 13320, 113040, 1063440, 11007360, 124467840, 1527724800, 20237817600, 287879961600, 4377595622400, 70875950745600, 1217444836608000, 22115388911616000, 423623726862336000, 8534364149735424000
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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MATHEMATICA
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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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