OFFSET
1,1
LINKS
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
EXAMPLE
From Omar E. Pol, Apr 22 2013 (Start):
When written as an irregular triangle begins:
4,6;
2,14,18;
2,14,18,6,42,54;
2,14,18,6,42,54,6,42,54,18,126,162;
2,14,18,6,42,54,6,42,54,18,126,162,6,42,54,18,126,162,18, 126,162,54,378,486;
2,14,18,6,42,54,6,42,54,18,126,162,6,42,54,18,126,162,...
(End)
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Feb 18 2010
EXTENSIONS
a(13)-a(65) from Lars Blomberg, Apr 22 2013
STATUS
approved