A267698 - OEIS

A267698

Q-toothpick sequence in the first quadrant starting with two Q-toothpicks centered at (1,3) and (3,1) respectively. The endpoints of the left hand Q-toothpick are at (0,3) and (1,4). The endpoints of the right hand Q-toothpick are at (3,0) and (4,1). With a(0) = 0.

0, 2, 6, 13, 25, 32, 44, 59, 79, 86, 98, 113, 133, 148, 176, 215, 251, 258, 270, 285, 305, 320, 348, 387, 423, 438

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,2

COMMENTS

a(n) is the total number of Q-toothpicks in the structure after n-th stage.

A267699 (the first differences) gives the number of Q-toothpicks added at n-th stage.

Note that this sequence is also related with the structure and the formula of A187210. For more information see A187210, A267694 and A139250.

LINKS

Table of n, a(n) for n=0..25.

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

Index entries for sequences related to cellular automata