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

 

Logo

Annual appeal: Please make a donation to keep the OEIS running! Over 6000 articles have referenced us, often saying "we discovered this result with the help of the OEIS".
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A118102 Triangle read by rows giving successive states of cellular automaton generated by "Rule 94" initiated with a single ON (black) cell. 5
1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Totals for row k, starting with k = 0, are {1, 3, 4, 6, 6, 8, 8, 10, 10, 12, 12, ...}, i.e., {1, 3} followed by A052928(k + 3). - Michael De Vlieger, Oct 08 2015

REFERENCES

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

LINKS

Robert Price, Table of n, a(n) for n = 0..9999

Michael De Vlieger, Visualization of rows 0 - 31 of Rule 94

Eric Weisstein's World of Mathematics, Rule 94

Eric Weisstein's World of Mathematics, Elementary Cellular Automaton

S. Wolfram, A New Kind of Science

Index to Elementary Cellular Automata

Index entries for sequences related to cellular automata

EXAMPLE

From Michael De Vlieger, Oct 08 2015: (Start)

First 12 rows, replacing "0" with ".", ignoring "0" outside of range of 1's for better visibility of ON cells:

                        1

                      1 1 1

                    1 1 . 1 1

                  1 1 1 . 1 1 1

                1 1 . 1 . 1 . 1 1

              1 1 1 . 1 . 1 . 1 1 1

            1 1 . 1 . 1 . 1 . 1 . 1 1

          1 1 1 . 1 . 1 . 1 . 1 . 1 1 1

        1 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 1

      1 1 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 1 1

    1 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 1

  1 1 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 1 1

1 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 . 1 1

(End)

MATHEMATICA

clip[lst_] := Block[{p = Flatten@ Position[lst, 1]}, Take[lst, {Min@ p, Max@ p}]]; FromDigits[#, 2] & /@ Map[clip, CellularAutomaton[94, {{1}, 0}, 24]] ; clip /@ CellularAutomaton[94, {{1}, 0}, 9] // Flatten (* Michael De Vlieger, Oct 08 2015 *)

CROSSREFS

Cf. A052928.

This sequence, A118101 and A071033 are equivalent descriptions of the Rule 94 automaton.

Sequence in context: A071031 A141679 A152904 * A089509 A157972 A124897

Adjacent sequences:  A118099 A118100 A118101 * A118103 A118104 A118105

KEYWORD

nonn,tabf

AUTHOR

Eric W. Weisstein, Apr 12 2006

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 | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy .

Last modified November 20 08:46 EST 2017. Contains 294962 sequences.