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x = 7, y = 7, rule = B3/S23 2o4bo$bo2b3o$bobo$2bobo$3bobo$3o2bo$o4b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C Still life
Pattern type Strict still life
Number of cells 20
Bounding box 7×7
Discovered by Robert Wainwright
Year of discovery 1971

Spiral (or tub with four tails) is one of the two smallest still lifes with four-fold rotational (C4) symmetry. It consists of a tub and four tails. It was found by Robert Wainwright in 1971.[1][2]

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