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Images by Brian: The Stalker
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Jacobite52: Sustrans milepost
fdecomite: ag10_10
fdecomite: Modular Origami
dinparvar: Private wide way
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jbuddenh: Ring of 17 circles
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Erroba: Scratching the surface of the depths of math
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Enrique Zeleny: Gaussian Rationals Froth
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Enrique Zeleny: Voronoi Diagram for a Collatz Problem Graph
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Enrique Zeleny: Circular Tiling Based on a Recursive Sequence 2