OFFSET
0,3
COMMENTS
Equivalently, a(n) is the number of cells turned ON at stage n of the cellular automaton described in A350632.
LINKS
EXAMPLE
The first 5 generations can be depicted as follows:
. . . . . . . . . . .
. 5 5 . . . . . 5 5 .
. 5 4 4 4 4 4 4 4 5 .
. . 4 3 3 . 3 3 4 . .
. . 4 3 2 2 2 3 4 . .
. . 4 . 2 1 2 . 4 . .
. . 4 3 2 2 2 3 4 . .
. . 4 3 3 . 3 3 4 . .
. 5 4 4 4 4 4 4 4 5 .
. 5 5 . . . . . 5 5 .
. . . . . . . . . . .
- so a(0) = 0,
a(1) = 1,
a(2) = 8,
a(3) = 12,
a(4) = 24,
a(5) = 12.
PROG
(C++) See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Jan 08 2022
STATUS
approved