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%I A269177 #7 Feb 23 2016 12:09:14
%S A269177 0,3,6,7,11,12,14,15,19,22,24,27,28,30,31,35,38,44,47,48,51,54,55,56,
%T A269177 59,60,62,63,67,70,76,79,88,91,94,95,96,99,102,103,107,108,110,111,
%U A269177 112,115,118,119,120,123,124,126,127,131,134,140,143,152,155,158,159,176,179,182,183,187,188,190,191,192,195
%N A269177 Numbers that have a finite predecessor in Wolfram's Rule 124 cellular automaton; numbers n for which A269175(n) > 0.
%C A269177 Sequence A269174 sorted into ascending order with duplicates removed.
%C A269177 The indexing starts from zero, because a(0) = 0 is a special case in this sequence. (Zero is the only number which is its own predecessor).
%H A269177 Antti Karttunen, <a href="/A269177/b269177.txt">Table of n, a(n) for n = 0..8940</a>
%H A269177 Eric Weisstein's World of Mathematics, <a href="http://mathworld.wolfram.com/ElementaryCellularAutomaton.html">Elementary Cellular Automaton</a>
%H A269177 S. Wolfram, <a href="http://wolframscience.com/">A New Kind of Science</a>
%H A269177 <a href="/index/Ce#cell">Index entries for sequences related to cellular automata</a>
%H A269177 <a href="https://oeis.org/wiki/Index_to_Elementary_Cellular_Automata">Index to Elementary Cellular Automata</a>
%o A269177 (Scheme, with _Antti Karttunen_'s IntSeq-library)
%o A269177 (define A269177 (NONZERO-POS 0 0 A269175))
%Y A269177 Cf. A269174, A269175.
%Y A269177 Cf. A269176 (complement).
%Y A269177 Cf. A269178 (a subsequence).
%K A269177 nonn
%O A269177 0,2
%A A269177 _Antti Karttunen_, Feb 22 2016

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