OFFSET
0,2
COMMENTS
Also, total number of "ON" "subcells" at n-th stage in two of the four wedges of the "Ulam-Warburton" two-dimensional cellular automaton of A147562, but including the central "ON" cell. Assume that every "ON" cell contains four "subcells". - Omar E. Pol, Feb 22 2015
LINKS
FORMULA
a(n) = A079315(2n).
For n>=2, a(n) = 8*A151920(n-2) + 4.
a(n) = 4*A151917(n). - Omar E. Pol, Feb 22 2015
CROSSREFS
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Aug 05 2009, Aug 06 2009
STATUS
approved