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 A267190.
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 at a(17), where A161336 is a version of A161330 (the snowflake cellular automaton).
First differs from A266536 at a(13), where A266536 is a version of A170896 (the Schrandt-Ulam cellular automaton).
From Omar E. Pol, Oct 16 2017: (Start)
The graph of both A266536 and this sequence are very similar.
The graphs of these four sequences are similar, and the behavior looks like percolation.
LINKS
FORMULA
a(n) = (A267190(n+1) - 1)/4.
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Oct 08 2017
STATUS
approved