[seqfan] Re: Happy 3³+4³+5³+6³+7³+8³+9³

David Harden oddleehr at alum.mit.edu
Sun Jan 31 02:19:09 CET 2016

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2016 = (7^2-1)(7^2-7) = |GL_2(7)|
(It's also the order of GL_1(2017), though this is less interesting.)

---- David

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