A160416 Number of "ON" cells at n-th stage in simple 2-dimensional cellular automaton (see Comments for precise definition).

0, 1, 8, 11, 32, 39, 80, 89, 146, 159

Offset

0,3

Links

Table of n, a(n) for n=0..9.

David Applegate, Omar E. Pol and N. J. A. Sloane, The Toothpick Sequence and Other Sequences from Cellular Automata, Congressus Numerantium, Vol. 206 (2010), 157-191

N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Example

If we label the generations of cells turned ON by consecutive numbers we get the cell pattern shown below:
..9...9...9...9...9
...888.888.888.888.
...878.878.878.878.
...886668666866688.
..9..656.656.656..9
...886644464446688.
...878.434.434.878.
...886644222446688.
..9..656.212.656..9
000000000022446688.
0000000000.434.878.
000000000064446688.
000000000056.656..9
000000000066866688.
0000000000.878.878.
0000000000.888.888.
00000000009...9...9
0000000000.........
0000000000.........

Crossrefs

Cf. A139250, A139251, A152980, A153006, A160117, A160118, A160410, A160412, A160414.

Cf. A160796, A161417. [From Omar E. Pol, Jun 14 2009]

Sequence in context: A051791 A243975 A160796 * A056873 A303883 A304889

Adjacent sequences: A160413 A160414 A160415 * A160417 A160418 A160419

Keyword

nonn

Author

Omar E. Pol, May 20 2009, Jun 14 2009

Status

approved