

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.


5



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 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



CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



