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User talk:Jon Wild
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I am trying to confirm a(4) in A250001. Have only managed to generate 167 different arrangements of 4 circles so far. You have posted 'Illustration of about 60 of the 173 configurations of four circles'. (why 'about 60'?) Can you provide an illustration of all 173 configurations? Christopher B. Jones 05:08, 3 September 2015 (UTC)