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A188156 If A187211 is written, starting at its fifth term, as a triangle with rows of lengths 2, 4, 8, 16, ..., the n-th row begins with the first 2^n-1 terms of the present sequence. 1
22, 40, 54, 56, 70, 120, 134, 88, 70, 120, 150, 168, 246, 360, 326, 152, 70, 120, 150, 168, 246, 360, 342, 232, 246, 376, 454, 568, 838, 1032, 774, 280, 70, 120, 150, 168, 246, 360, 342, 232, 246, 376, 454, 568, 838, 1032 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Limiting behavior of the rows of the triangle in A187211.

LINKS

Table of n, a(n) for n=1..46.

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

Nathaniel Johnston, The Q-Toothpick Cellular Automaton

Index entries for sequences related to toothpick sequences

EXAMPLE

The triangle from A187211 begins:

22, 20

22, 40, 54, 40

22, 40, 54, 56, 70, 120, 134, 72

22, 40, 54, 56, 70, 120, 134, 88, 70, 120, 150, 168, 246, 360, 326, 136

...

Thus this sequence is 22, 40, 54, 56, 70, 120, 134, 88, 70, 120, 150, 168, 246, 360, 326...

The final entry of the n-th row (for n >= 2) is 16 + 8(2^n - 1).

CROSSREFS

Cf. A147646, A187210, A187211.

Sequence in context: A043976 A131196 A075217 * A026061 A138040 A154087

Adjacent sequences:  A188153 A188154 A188155 * A188157 A188158 A188159

KEYWORD

nonn

AUTHOR

Nathaniel Johnston, Mar 26 2011

EXTENSIONS

a(35) corrected by Nathaniel Johnston at the suggestion of Omar E. Pol, Mar 28 2011

STATUS

approved

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Last modified February 21 01:29 EST 2019. Contains 320364 sequences. (Running on oeis4.)