T-nosed p4

T-nosed p4
4b3o4b$5bo5b2$4b3o4b$3bo3bo3b$2bo5bo2b$2bobobobo2b$b2obobob2ob$o2b2ob 2o2bo$2o7b2o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART ]] #C [[ TRACKLOOP 4 0 0 GPS 2 THUMBSIZE 2 ]]
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Pattern type	Oscillator
Oscillator type	T-nose
Number of cells	31
Bounding box	11 × 12
Period	4 (mod: 4)
Heat	15
Volatility	0.55 | 0.49
Kinetic symmetry	Unspecified
Discovered by	Robert Wainwright
Year of discovery	1989
Rules Outer-totalistic rules B3/S23 – B3/S0238 # of rules 22 = 4
Pattern files Plaintext tnosedp4.cells RLE tnosedp4.rle
Identifiers apgcode xp4_35s2e0e2s53zx1iqi1 Pentadecathlon ID 31P4.1

T-nosed p4 is a period 4 oscillator that was found in October 1989 by Robert Wainwright. It can be used as a filter that deletes every other lightweight spaceship in a stream of period 4n + 2.

A variant based on the overweight emulator is shown below.

x = 17, y = 12, rule = B3/S23 2$7b3o2$6bo3bo$2b2obo5bob2o$2bo11bo$3b2o7b2o$3o2b7o2b3o$o2bo9bo2bo$b2o 5bo5b2o$7b3o! #C [[ THUMBSIZE 2 THEME 6 GRID GRIDMAJOR 0 SUPPRESS THUMBLAUNCH ]] #C [[ AUTOSTART GPS 2 LOOP 4 THUMBLAUNCH THUMBSIZE 2 THEME 6 ZOOM 16 HEIGHT 320 ]]

(click above to open LifeViewer) RLE: here Plaintext: here

See also

• T-nosed p6

External links

• T-nosed p4 at the Life Lexicon

• T-nosed p4 at Adam P. Goucher's Catagolue

• 31P4.1 at Heinrich Koenig's Game of Life Object Catalogs