A294962 a(n) is the total number of elements after n-th stage of a hybrid (and finite) cellular automaton formed by toothpicks, D-toothpicks and T-toothpicks on the infinite square grid (see Comments lines for precise definition).

0, 1, 5, 13, 21, 33, 53, 69, 77, 101, 117

Offset

0,3

Comments

It seems that this cellular automaton resembles the synthesis of a molecule, a protein, etc.

After 10th stage there are no exposed endpoints in the structure, so the structure is finished.

A294963(n) gives the number of elements added to the structure at n-th stage.

Links

Table of n, a(n) for n=0..10.

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

Index entries for sequences related to cellular automata

Index entries for sequences related to toothpick sequences

Crossrefs

Cf. A139250 (toothpicks), A160172 (T-toothpicks), A194700 (D-toothpicks), A220500, A294963.

For other hybrid cellular automata, see A289840, A290220, A294020, A294980.

Sequence in context: A273392 A273453 A299770 * A316357 A252296 A273569

Adjacent sequences: A294959 A294960 A294961 * A294963 A294964 A294965

Keyword

nonn,fini,full

Author

Omar E. Pol, Nov 12 2017

Status

approved