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%I #2 Mar 30 2012 16:51:44
%S 5,12,7,12,36,5,5,5,5,36,12,7,12,5,3,3,5,12,7,12,-1,5,5,5,5,22,12,7,
%T 12,5
%N Critical block length for legal totalistic k=2, r=2 cellular automaton with code 2n (-1 indicates the value is infinite).
%D S. Wolfram, Universality and cpmplexity in cellular automata, Physica 10D (1984), 1-35 (reprinted in Celluar Automata, ed. D. Farmer et al., North-Holland, 1984).
%K sign
%O 1,1
%A _N. J. A. Sloane_, Apr 29 2010