Keywords: Partitions of 6-set with 3 singletons.svg Set P containing the 20 partitions of a hexagon vertice set a b c d e f that have 3 singletons; P up to rotation; P up to rotation and reflection Compare box 6 2 in 280px or box 6 4 in 400px own mate2code Set partitions Necklace combinatorics Colored partitions violet green brown red ImageNote 1 88 63 10 12 462 675 2 a ImageNoteEnd 1 ImageNote 2 68 62 12 12 462 675 2 b ImageNoteEnd 2 ImageNote 3 60 46 12 12 462 675 2 c ImageNoteEnd 3 ImageNote 4 68 32 12 12 462 675 2 d ImageNoteEnd 4 ImageNote 5 85 30 12 12 462 675 2 e ImageNoteEnd 5 ImageNote 6 94 45 12 12 462 675 2 f ImageNoteEnd 6 |