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A170886 Similar to A160406, but always staying outside the wedge, starting at stage 1 with a toothpick whose midpoint touches the vertex of the wedge. 5
0, 1, 3, 5, 7, 11, 17, 23, 29, 37, 49, 55, 63, 75, 93, 107, 121, 141, 161, 167, 175, 187, 205, 219, 235, 259, 285, 301, 325, 363, 409, 447, 489, 541, 577, 583, 591, 603, 621, 635, 651, 675, 701, 717, 741, 779, 825, 863, 907, 963, 1005, 1021, 1045, 1083, 1129 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

See A170887 for the first differences.

LINKS

Table of n, a(n) for n=0..54.

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, A170887, A170888, A170890, A170892.

Sequence in context: A152998 A222176 A108539 * A238137 A090919 A065557

Adjacent sequences:  A170883 A170884 A170885 * A170887 A170888 A170889

KEYWORD

nonn

AUTHOR

Omar E. Pol, Jan 09 2010

EXTENSIONS

Terms beyond a(9) from R. J. Mathar, Jan 25 2010

STATUS

approved

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Last modified November 21 12:20 EST 2019. Contains 329370 sequences. (Running on oeis4.)