The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A265205 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A265205

Number of ON (black) cells in the n-th iteration of the "Rule 73" elementary cellular automaton starting with a single ON (black) cell.
(history; published version)

#11 by Alois P. Heinz at Fri Jul 26 21:02:08 EDT 2024

STATUS

proposed

approved

#10 by Andrey Zabolotskiy at Fri Jul 26 17:35:49 EDT 2024

STATUS

editing

proposed

#9 by Andrey Zabolotskiy at Fri Jul 26 17:35:20 EDT 2024

NAME

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

STATUS

approved

editing

Discussion

Fri Jul 26

17:35

Andrey Zabolotskiy: Unifying the name with 37 other sequences

#8 by N. J. A. Sloane at Sat Dec 05 15:20:41 EST 2015

STATUS

proposed

approved

#7 by Robert Price at Sat Dec 05 13:16:39 EST 2015

STATUS

editing

proposed

#6 by Robert Price at Sat Dec 05 13:16:34 EST 2015

LINKS

Robert Price, <a href="/A265205/b265205.txt">Table of n, a(n) for n = 0..999</a>

STATUS

approved

editing

#5 by N. J. A. Sloane at Sat Dec 05 00:10:48 EST 2015

STATUS

editing

approved

#4 by N. J. A. Sloane at Sat Dec 05 00:10:29 EST 2015

NAME

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

STATUS

proposed

editing

Discussion

Sat Dec 05

00:10

N. J. A. Sloane: "ON" is clearer than "black"

#3 by Robert Price at Fri Dec 04 15:48:36 EST 2015

STATUS

editing

proposed

#2 by Robert Price at Fri Dec 04 15:47:59 EST 2015

NAME

allocated for Robert PriceNumber of Black cells in the n-th iteration of the "Rule 73" elementary cellular automaton starting with a single black cell.

DATA

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

Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ElementaryCellularAutomaton.html">Elementary Cellular Automaton</a>

<a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>

<a href="https://oeis.org/wiki/Index_to_Elementary_Cellular_Automata">Index to Elementary Cellular Automata</a>

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.

KEYWORD

allocated

nonn,easy,new

AUTHOR

Robert Price, Dec 04 2015

STATUS

approved

editing