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A187217 Number of Q-toothpicks added at n-th stage to the structure of A187216. 2
0, 2, 6, 8, 14, 22, 30, 22, 38, 54, 70, 22, 38, 54, 70, 54, 102, 150, 134, 22, 38, 54, 70, 54, 102, 150, 134, 54, 102, 150, 166, 182, 326, 406, 262, 22, 38, 54, 70, 54, 102, 150, 134, 54, 102, 150, 166, 182, 326, 406, 262, 54, 102, 150, 166, 182, 326, 406, 294, 182, 326 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

Essentially the first differences of A187216.

LINKS

Nathaniel Johnston, Table of n, a(n) for n = 0..200

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.]

Nathaniel Johnston, The Q-Toothpick Cellular Automaton

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

CROSSREFS

Cf. A139250, A139251, A187216, A187211, A187213, A187221.

Sequence in context: A137831 A117588 A174229 * A022112 A107019 A269831

Adjacent sequences:  A187214 A187215 A187216 * A187218 A187219 A187220

KEYWORD

nonn

AUTHOR

Omar E. Pol, Mar 30 2011

EXTENSIONS

a(15) - a(60) from Nathaniel Johnston, Apr 15 2011

STATUS

approved

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Last modified January 19 05:21 EST 2019. Contains 319304 sequences. (Running on oeis4.)