The sequence gives the number of T-toothpicks after n rounds.
See A160172 for more information about T-toothpick sequences.
Table of n, a(n) for n=0..17.
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, A160172, A160173.
Sequence in context: A267700 A161910 A151920 * A256644 A219764 A286003
Adjacent sequences: A160711 A160712 A160713 * A160715 A160716 A160717
Omar E. Pol, Jun 02 2009