OFFSET
0,3
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 0..926
David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191. [There is a typo in Theorem 6: (13) should read u(n) = 4.3^(wt(n-1)-1) for n >= 2.]
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
N. J. A. Sloane, Illustration of first 8 generations
CROSSREFS
KEYWORD
sign
AUTHOR
N. J. A. Sloane, Jul 23 2009
EXTENSIONS
Terms after a(8) from Nathaniel Johnston, Apr 02 2011
STATUS
approved