OFFSET
0,2
COMMENTS
Also, total number of cubic ON cells after n generations in a three-dimensional cellular automaton in which A253086(n) gives the number of cubic ON cells in the n-th level of the structure starting from the top. An ON cell remains ON forever. The structure looks like an irregular stepped pyramid.
LINKS
CROSSREFS
KEYWORD
nonn
AUTHOR
Omar E. Pol, Feb 15 2015
STATUS
approved