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 A161331 First differences of A161330. 13
 0, 2, 6, 6, 6, 18, 6, 18, 18, 18, 30, 18, 30, 42, 6, 18, 18, 30, 54, 30, 78, 42, 54, 78, 42, 66, 78, 18, 42, 42, 54, 90, 66, 126, 90, 90, 102, 66, 78, 90, 90, 90, 54, 66, 114, 78, 126, 126, 102, 102, 138, 102, 162, 102, 114, 162, 126, 162, 114, 102, 102, 126, 186, 186, 150, 138, 126, 162, 162, 186, 198, 114, 114, 162 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 COMMENTS Number of E-toothpicks added to the snowflake structure at n-th round. LINKS David Applegate, Table of n, a(n) for n = 0..1000 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.] N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS CROSSREFS Cf. A139250, A139251, A160121, A160173, A161328, A161329, A161330. Sequence in context: A071888 A117217 A260930 * A120627 A089879 A087651 Adjacent sequences:  A161328 A161329 A161330 * A161332 A161333 A161334 KEYWORD nonn AUTHOR Omar E. Pol, Jun 07 2009 EXTENSIONS More terms from David Applegate, Dec 13 2012 STATUS approved

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Last modified January 20 14:13 EST 2019. Contains 319333 sequences. (Running on oeis4.)