OFFSET
0,5
LINKS
Nathaniel Johnston, Table of n, a(n) for n = 0..999
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
CROSSREFS
KEYWORD
sign
AUTHOR
Omar E. Pol, May 23 2009
EXTENSIONS
a(11) corrected and more terms from Nathaniel Johnston, Mar 22 2011
STATUS
approved