A097981 Cell populations in the development of the 2 X 2 square with the 2D cellular automaton rule seeds (/2).

4, 8, 12, 16, 24, 32, 52, 40, 56, 72, 72, 92, 128, 140, 136, 160, 152, 200, 244, 236, 264, 232, 268, 360, 316, 416, 320, 384, 436, 412, 500, 492, 500, 524, 680, 584, 744, 700, 764, 884, 896, 748, 1056, 864, 888, 992, 1036, 1060, 1296, 1268, 1436, 1408, 1472

Offset

0,1

Links

Eric M. Schmidt, Table of n, a(n) for n = 0..1000

Eric M. Schmidt, C++ code to compute this sequence

Mirek Wojtowicz, Information on many 2D cellular automata

Index entries for sequences related to cellular automata

Example

a(0) = 4 because the 2 X 2 square contains 4 cells. a(1) = 8 because 8 cells are neighbors of exactly 2 of the original 4 cells. a(2) = 12 because 12 cells are neighbors of exactly 2 of the previous 8 cells.

Crossrefs

Cf. A097995, A097996.

Sequence in context: A071385 A329883 A066192 * A330972 A033833 A291834

Adjacent sequences: A097978 A097979 A097980 * A097982 A097983 A097984

Keyword

nonn

Author

Oliver Pechenik, Sep 07 2004

Extensions

Offset changed by Eric M. Schmidt, Mar 10 2013

Status

approved