login
A172305
Number of L-toothpicks added to the L-toothpick structure of A172304 at the n-th stage.
7
0, 2, 4, 8, 8, 8, 16, 16, 8, 16, 24, 24, 32, 24, 48, 40, 24, 16, 24, 40, 48, 40, 56, 56, 64, 64, 72, 56, 64, 48, 80, 88, 32, 32, 64, 72, 64, 40, 64, 80, 96, 104, 144, 96, 128, 120, 160, 112, 96, 80, 128, 128, 144, 88, 136, 128, 136, 144, 168, 168, 216, 160, 192, 168, 64, 80, 128
OFFSET
0,2
LINKS
David Applegate, The movie version
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.]
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Feb 06 2010
EXTENSIONS
More terms from Colin Barker, Apr 19 2015
a(49)-a(66) from Robert Price, Jun 17 2019
STATUS
approved