User blog comment:Googleaarex/Factorial N-ational/@comment-25371339-20140918003952/@comment-25371339-20140919014617

Extension!

n!1(1(2)2)2 = n!1(1,1...1,1,2)2 with n 1's

n!1(1(2)3)2 = n!1(1,1...1,1,2(2)2)2 with n 1's on first row

n!1(1(2)1(2)2)2 = n!1(1(2)1,1...1,1,2)2 with n 1's on second row

n!1(1(3)2)2 = n!1(1(2)1...1(2)1(2)2)2 with n 1's

Yeah, this was kinda copied.

But it was my idea originally.

Or is it?