

A267698


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


4



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
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OFFSET

0,2


COMMENTS

a(n) is the total number of Qtoothpicks in the structure after nth stage.
A267699 (the first differences) gives the number of Qtoothpicks added at nth 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
Index entries for sequences related to toothpick sequences


CROSSREFS

Cf. A139250, A187210, A187220, A267694, A267699.
Sequence in context: A003600 A000135 A281865 * A065220 A048094 A181522
Adjacent sequences: A267695 A267696 A267697 * A267699 A267700 A267701


KEYWORD

nonn,more


AUTHOR

Omar E. Pol, Jan 23 2016


STATUS

approved



