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A172312 a(n) = A172311(n+1)/2. 8
1, 2, 3, 4, 6, 7, 7, 9, 9, 10, 12, 12, 19, 17, 21, 17, 13, 14, 16, 19, 25, 27, 29, 29, 33, 30, 28, 25, 33, 33, 33, 35, 21, 26, 28, 27, 31, 33, 39, 44 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..40.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata

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

CROSSREFS

Cf. A139250, A139251, A172310, A172311.

Sequence in context: A072766 A071652 A089884 * A086163 A175059 A071789

Adjacent sequences:  A172309 A172310 A172311 * A172313 A172314 A172315

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jan 31 2010

EXTENSIONS

More terms from Nathaniel Johnston, Nov 15 2010

STATUS

approved

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Last modified February 23 05:44 EST 2018. Contains 299473 sequences. (Running on oeis4.)