A265206 Total number of ON cells after n iterations of the "Rule 73" elementary cellular automaton starting with a single ON cell.

1, 1, 4, 4, 11, 13, 18, 20, 29, 35, 40, 50, 63, 69, 80, 90, 105, 115, 134, 144, 167, 177, 194, 214, 233, 249, 274, 292, 311, 331, 356, 370, 407, 427, 454, 480, 515, 535, 572, 602, 643, 667, 700, 736, 775, 801, 846, 882, 919, 957, 998, 1034, 1083, 1127, 1156

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[Take[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}], k]], {k, 1, rows}]

Crossrefs

Cf. A245549, A262448, A265122, A265156, A265205.

Sequence in context: A266438 A128499 A325859 * A327684 A231064 A302516

Adjacent sequences: A265203 A265204 A265205 * A265207 A265208 A265209

Keyword

nonn,easy

Author

Robert Price, Dec 04 2015

Status

approved