x = 24, y = 10, rule = B3678/S34678
5b4o8boboo$4b4obboo6bo$bb9obo3bob3obo$bob9o5b5o$ob10obbobb6o$24o$ob7ob
11obo$bob4obbob9obbo$bb4obo5b8o$5boo9boo!
A period 260 puffer which leaves four period 16 oscillators.
This is the basis of a period 260 spaceship with a big spark which can
easily perturb debris, and which can be used to build several pseudo-
period 260 backwards rakes.
David I. Bell, May 1997
