1,1
David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
Cf. A139250, A139251, A152980, A153006.
Sequence in context: A025526 A047962 A047961 * A028875 A008245 A002441
Adjacent sequences: A159798 A159799 A159800 * A159802 A159803 A159804
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Omar E. Pol (info(AT)polprimos.com), May 18 2009