A265205 Number of ON cells in the n-th iteration of the "Rule 73" elementary cellular automaton starting with a single ON cell.

1, 0, 3, 0, 7, 2, 5, 2, 9, 6, 5, 10, 13, 6, 11, 10, 15, 10, 19, 10, 23, 10, 17, 20, 19, 16, 25, 18, 19, 20, 25, 14, 37, 20, 27, 26, 35, 20, 37, 30, 41, 24, 33, 36, 39, 26, 45, 36, 37, 38, 41, 36, 49, 44, 29, 56, 39, 40, 57, 40, 43, 60, 39, 48, 55, 44, 45, 64

Offset

0,3

References

S. Wolfram, A New Kind of Science, Wolfram Media, 2002; p. 55.

Links

Robert Price, Table of n, a(n) for n = 0..999

Eric Weisstein's World of Mathematics, Elementary Cellular Automaton

Index entries for sequences related to cellular automata

Index to Elementary Cellular Automata

Mathematica

rule = 73; rows = 30; Table[Total[Table[Take[CellularAutomaton[rule, {{1}, 0}, rows-1, {All, All}][[k]], {rows-k+1, rows+k-1}], {k, 1, rows}][[k]]], {k, 1, rows}]

Crossrefs

Cf. A245549, A262448, A265122, A265156.

Sequence in context: A201571 A010600 A175918 * A263210 A298095 A327803

Adjacent sequences: A265202 A265203 A265204 * A265206 A265207 A265208

Keyword

nonn,easy

Author

Robert Price, Dec 04 2015

Status

approved