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A170884 In the toothpick structure of A160160, the number of nodes occupied after n steps, assuming that the toothpicks have length 2. 4
0, 3, 7, 15, 27, 39, 51, 67, 99, 155, 223, 263, 283, 299, 331, 387, 467, 555, 659, 811, 1067, 1443, 1831, 1995, 2059, 2083, 2123, 2179, 2259, 2347, 2451, 2603, 2859, 3235, 3659, 3955, 4211, 4483, 4899, 5451 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

See A170885 for the first differences.

LINKS

Table of n, a(n) for n=0..39.

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, A170885.

Sequence in context: A303220 A301894 A213215 * A182836 A097080 A274008

Adjacent sequences:  A170881 A170882 A170883 * A170885 A170886 A170887

KEYWORD

nonn

AUTHOR

David Applegate, Omar E. Pol and N. J. A. Sloane, Jan 09 2010

EXTENSIONS

a(7)-a(39) from Nathaniel Johnston, Nov 13 2010

STATUS

approved

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Last modified October 16 08:03 EDT 2018. Contains 316259 sequences. (Running on oeis4.)