login
A269523
Number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 630", based on the 5-celled von Neumann neighborhood.
3
1, 5, 9, 21, 29, 45, 65, 89, 125, 133, 161, 181, 213, 261, 277, 333, 345, 493, 521, 573, 577, 653, 673, 785, 809, 905, 1009, 1033, 997, 1201, 1193, 1357, 1389, 1741, 1561, 1865, 1813, 2013, 1989, 2221, 2157, 2357, 2393, 2581, 2549, 2833, 3005, 2981, 3241
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=630; 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 *) Map[Function[Apply[Plus, Flatten[#1]]], ca] (* Count ON cells at each stage *)
CROSSREFS
Sequence in context: A169649 A273739 A169709 * A319384 A211427 A273410
KEYWORD
nonn,easy
AUTHOR
Robert Price, Feb 28 2016
STATUS
approved