A161331 First differences of A161330.

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

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