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A227405 Order of the symmetry group of the densest possible packing of N circles in a larger circle. (If there are different patterns with the same density pick the largest value of the symmetry group order.) 0

%I

%S 4,6,8,10,12,12,14,16,2,2,6,2

%N Order of the symmetry group of the densest possible packing of N circles in a larger circle. (If there are different patterns with the same density pick the largest value of the symmetry group order.)

%C a(14) is unknown but conjectured to be 2.

%C The conjectured sequence is 4, 6, 8, 10, 12, 12, 14, 16, 2, 2, 6, 2, 2, 10, 2, 2, 12, 12, 2...

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Circle_packing_in_a_circle">Circle packing in a circle</a>

%K sign,hard,more

%O 2,1

%A _Keenan Pepper_, Sep 21 2013

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Last modified May 26 19:44 EDT 2019. Contains 323597 sequences. (Running on oeis4.)