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A269812
Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 33", based on the 5-celled von Neumann neighborhood.
1
1, 5, 10, 42, 51, 143, 164, 328, 353, 641, 678, 1098, 1155, 1727, 1812, 2544, 2633, 3617, 3718, 4962, 5083, 6603, 6768, 8540, 8749, 10833, 11102, 13514, 13795, 16543, 16892, 19976, 20329, 23921, 24286, 28394, 28779, 33419, 33848, 38996, 39469, 45181, 45730
OFFSET
0,2
COMMENTS
Initialized with a single black (ON) cell at stage zero.
REFERENCES
S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 170.
MATHEMATICA
rule=33; stages=300;
ca=CellularAutomaton[{rule, {2, {{0, 2, 0}, {2, 1, 2}, {0, 2, 0}}}, {1, 1}}, {{{1}}, 0}, stages]; (* Start with single black cell *)
on=Map[Function[Apply[Plus, Flatten[#1]]], ca] (* Count ON cells at each stage *)
Table[Total[Part[on, Range[1, i]]], {i, 1, Length[on]}] (* Sum at each stage *)
CROSSREFS
Cf. A269810.
Sequence in context: A321307 A270288 A271805 * A271127 A270016 A271162
KEYWORD
nonn,easy
AUTHOR
Robert Price, Mar 05 2016
STATUS
approved