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A070952 Number of 1's in n-th generation of 1-D CA using Rule 30, started with a single 1. 19
1, 3, 3, 6, 4, 9, 5, 12, 7, 12, 11, 14, 12, 19, 13, 22, 15, 19, 20, 24, 21, 23, 23, 28, 26, 27, 26, 33, 30, 34, 31, 39, 26, 39, 29, 46, 32, 44, 38, 45, 47, 41, 45, 49, 38, 55, 42, 51, 44, 53, 43, 59, 52, 60, 49, 65, 57, 60, 56, 69, 61, 70, 59, 78, 64, 56, 65, 69, 69 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Number of 1's in n-th row of triangle in A070950.

Row sums in A070950; a(n) = 2*n + 1 - A070951(n). - Reinhard Zumkeller, Jun 07 2013

LINKS

N. J. A. Sloane, Table of n, a(n) for n = 1..10000

N. J. A. Sloane, Illustration of first 20 generations

N. J. A. Sloane, On the Number of ON Cells in Cellular Automata, arXiv:1503.01168, 2015

Eric Weisstein's World of Mathematics, Rule 30

Wikipedia, Rule 30

Index entries for sequences related to cellular automata

EXAMPLE

May be arranged into blocks of length 1,1,2,4,8,16,...:

1,

3,

3, 6,

4, 9, 5, 12,

7, 12, 11, 14, 12, 19, 13, 22,

15, 19, 20, 24, 21, 23, 23, 28, 26, 27, 26, 33, 30, 34, 31, 39,

26, 39, 29, 46, 32, 44, 38, 45, 47, 41, 45, 49, 38, 55, 42, 51,

    44, 53, 43, 59, 52, 60, 49, 65, 57, 60, 56, 69, 61, 70, 59, 78,

64, 56, 65, 69, 69, ...

MATHEMATICA

Map[Function[Apply[Plus, Flatten[ #1]]], CellularAutomaton[30, {{1}, 0}, 100]] (N. J. A. Sloane, Aug 10 2009)

PROG

(Haskell)

a070952 = sum . a070950_row  -- Reinhard Zumkeller, Jun 07 2013

CROSSREFS

Cf. A071049, A070950, A070951, A151929, A051023.

Cf. A110267 (partial sums), A246023, A246024, A246025, A246026, A246597.

A265703 is an essentially identical sequence.

Sequence in context: A135986 A069734 A265703 * A137462 A163926 A050346

Adjacent sequences:  A070949 A070950 A070951 * A070953 A070954 A070955

KEYWORD

nonn,easy,nice

AUTHOR

N. J. A. Sloane, May 19 2002, Aug 10 2009

EXTENSIONS

More terms from Hans Havermann, May 26 2002

Corrected offset and initial term - N. J. A. Sloane, Jun 07 2013

STATUS

approved

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Last modified February 11 18:36 EST 2016. Contains 268186 sequences.