login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A267446 Total number of ON (black) cells after n iterations of the "Rule 129" elementary cellular automaton starting with a single ON (black) cell. 1
1, 1, 2, 2, 7, 10, 15, 15, 28, 39, 52, 59, 76, 87, 100, 100, 129, 156, 185, 208, 241, 268, 297, 312, 353, 388, 425, 448, 489, 516, 545, 545, 606, 665, 726, 781, 846, 905, 966, 1013, 1086, 1153, 1222, 1277, 1350, 1409, 1470, 1501, 1590, 1673, 1758, 1829, 1918 (list; graph; refs; listen; history; text; internal format)
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..1000

Eric Weisstein's World of Mathematics, Elementary Cellular Automaton

S. Wolfram, A New Kind of Science

Index entries for sequences related to cellular automata

Index to Elementary Cellular Automata

MATHEMATICA

rule=129; rows=20; ca=CellularAutomaton[rule, {{1}, 0}, rows-1, {All, All}]; (* Start with single black cell *) catri=Table[Take[ca[[k]], {rows-k+1, rows+k-1}], {k, 1, rows}]; (* Truncated list of each row *) nbc=Table[Total[catri[[k]]], {k, 1, rows}]; (* Number of Black cells in stage n *) Table[Total[Take[nbc, k]], {k, 1, rows}] (* Number of Black cells through stage n *)

CROSSREFS

Cf. A267417.

Sequence in context: A307633 A101372 A133374 * A054226 A000024 A005223

Adjacent sequences:  A267443 A267444 A267445 * A267447 A267448 A267449

KEYWORD

nonn,easy

AUTHOR

Robert Price, Jan 15 2016

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 21 23:04 EDT 2019. Contains 326169 sequences. (Running on oeis4.)