

A182634


Toothpick sequence on hexagonal net starting at the vertex of an infinite 120degree wedge.


8



0, 1, 3, 7, 11, 15, 23, 35, 43, 47, 55, 71, 91, 107, 127, 155, 171, 175, 183, 199, 219, 239, 267, 311, 355, 379, 399, 439, 495, 543, 595, 659, 691, 695, 703, 719, 739, 759, 787, 831, 875, 903, 931, 983, 1059, 1135, 1211
(list;
graph;
refs;
listen;
history;
text;
internal format)



OFFSET

0,3


COMMENTS

The sequence gives the number of toothpicks after n stages. A182635 (the first differences) gives the number added at the nth stage.
The 120degree wedge defines a conic region which toothpicks (except one end point of the initial toothpick) are not allowed to cross or touch. The wings of the wedge point +60 degrees away from the pointing direction of the initial toothpick.
Toothpicks are connected by their endpoints, the same as the toothpicks of A182632.
First differs from A139250 at a(11).


LINKS



FORMULA



CROSSREFS



KEYWORD

nonn,more


AUTHOR



STATUS

approved



