OFFSET
1,2
COMMENTS
The cells are the squares of the standard square grid. All cells are initially OFF and one cell is turned ON at generation 1. At subsequent generations a cell is ON if and only if (1) exactly one of the four nearest side neighbors was ON or (2) exactly one of the four nearest corner neighbors was ON in the previous generation.(If exactly one side (corner) was ON, it does not matter how many corners (sides) were ON.)
LINKS
MATHEMATICA
(* Mathematica 8.0*) ca = CellularAutomaton[{2165730, {2, {{5, 1, 5}, {1, 0, 1}, {5, 1, 5}}}, {1, 1}}, {{{1}}, 0}, 50, 51]; a = Table[Total[ca[[i]], 2], {i, 1, 50}]
CROSSREFS
KEYWORD
nonn
AUTHOR
John W. Layman, Aug 30 2011
STATUS
approved