OFFSET
0,3
COMMENTS
The structure looks like a tree which arises from one of the four spokes of the structure of the cellular automaton of A151895.
a(n) is the total number of ON cells after n-th stage.
For n >> 1 the structure looks like a square which is rotated 45 degrees.
First differs from A161336 (snowflake tree) at a(16).
First differs from A266536 at a(13). - Omar E. Pol, Apr 02 2016
LINKS
FORMULA
a(n) = (A151895(n+1) - 1)/4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Jan 12 2016
EXTENSIONS
More terms from Omar E. Pol, Apr 02 2016
STATUS
approved