# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/

Search: id:a097981
Showing 1-1 of 1

%I A097981 #13 Feb 18 2015 07:53:46
%S A097981 4,8,12,16,24,32,52,40,56,72,72,92,128,140,136,160,152,200,244,236,
%T A097981 264,232,268,360,316,416,320,384,436,412,500,492,500,524,680,584,744,
%U A097981 700,764,884,896,748,1056,864,888,992,1036,1060,1296,1268,1436,1408,1472
%N A097981 Cell populations in the development of the 2 X 2 square with the 2D cellular automaton rule seeds (/2).
%H A097981 Eric M. Schmidt, <a href="/A097981/b097981.txt">Table of n, a(n) for n = 0..1000</a>
%H A097981 Eric M. Schmidt, <a href="/A097981/a097981.cpp.txt">C++ code to compute this sequence</a>
%H A097981 Mirek Wojtowicz, <a href="http://www.mirekw.com/ca/">Information on many 2D cellular automata</a>
%H A097981 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>
%e A097981 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.
%Y A097981 Cf. A097995, A097996.
%K A097981 nonn
%O A097981 0,1
%A A097981 _Oliver Pechenik_, Sep 07 2004
%E A097981 Offset changed by _Eric M. Schmidt_, Mar 10 2013

# Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE