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  • (cur | prev) 14:34, February 7, 2018191.112.171.254 (Talk)‎ . . (1,558 bytes) (+1,558)‎ . . (Created page with "An '''octagonal number''' is a figurate number that represents an octagon. The octagonal number for ''n'' is given by the formula 3''n''<sup>2</sup> - 2''n'', with ''n'' >...")
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