OFFSET
0,2
COMMENTS
Number of cells turned "ON" at n-th stage of cellular automaton of A262620.
LINKS
FORMULA
a(n) = 4 * A261693(n), n >= 1.
EXAMPLE
With the terms written as an irregular triangle in which row lengths are the terms of A011782 the sequence begins:
1;
4;
12, 4;
28, 20, 12, 4;
60, 52, 44, 36, 28, 20, 12, 4;
124, 116, 108, 100, 92, 84, 76, 68, 60, 52, 44, 36, 28, 20, 12, 4;
...
CROSSREFS
KEYWORD
nonn,tabf
AUTHOR
Omar E. Pol, Nov 03 2015
STATUS
approved