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Line 88: P<sub>n</sub> = (2n<sup>3</sup>+3n<sup>2</sup>+n)/6 :--[[User:Ancora Luciano\|Ancora Luciano]] ([[User talk:Ancora Luciano\|talk]]) 06:15, 22 May 2013 (UTC)

Talk:Square pyramidal number: Difference between revisions