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.

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

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: A331891 A331896 A108539 * A361823 A238137 A090919

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