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Keywords: Centered hexagonal = 1 + 6triangular.svg en Relation between w centered hexagonal numbers and w triangular numbers own Incnis Mrsi 2013-03-01 a Text editor 4671 654 d b c d <small>So what Incnis Mrsi <span class signature-talk >talk</span> 15 06 17 July 2013 UTC </small> Cc-zero Centered hexagonal numbers Triangular numbers Hexagonal tilings 60° 120° 6-fold rotational symmetry Chiral images with rotational symmetry 06 |