OFFSET
0,3
COMMENTS
This is a toothpick sequence of forking paths to 135 degrees in the first quadrant. The sequence gives the number of toothpicks and D-toothpicks in the structure after n-th stage. A220525 (the first differences) give the number of toothpicks or D-toothpicks added at n-th stage. It appears that the structure has a fractal (or fractal-like) behavior. For more information see A194700.
First differs from A194444 at a(13).
LINKS
FORMULA
a(n) = A220514(n)/4. - Omar E. Pol, Mar 23 2013
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Dec 15 2012
STATUS
approved