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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).
7
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.
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
KEYWORD
nonn,fini,full
AUTHOR
Omar E. Pol, Nov 12 2017
STATUS
approved