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A338097
Number of ON cells after n generations of cellular automaton based on a hexagonal grid and starting with two adjacent ON cells where an OFF cell is turned ON if exactly two of its six neighbors are ON.
2
0, 2, 4, 8, 12, 18, 22, 28, 32, 36, 44, 56, 76, 86, 100, 116, 130, 144, 164, 178, 198, 218, 242, 260, 282, 306, 350, 386, 414, 446, 460, 484, 516, 556, 586, 638, 688, 736, 770, 800, 828, 872, 914, 964, 1012, 1068, 1122, 1162, 1204, 1252, 1300, 1360, 1408, 1462
OFFSET
0,2
COMMENTS
An ON cell remains ON forever.
PROG
(PARI) See Links section.
CROSSREFS
Cf. A151731 (square grid variant), A338098.
Sequence in context: A373728 A292060 A152125 * A305694 A176562 A337120
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Oct 10 2020
STATUS
approved