Table of n, a(n) for n=1..27.
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
Sequence in context: A121509 A096071 A230117 * A078723 A294368 A296556
Adjacent sequences: A159788 A159789 A159790 * A159792 A159793 A159794
Omar E. Pol, Apr 28 2009