A253767 Partial sums of A247666.

1, 8, 15, 40, 47, 96, 121, 224, 231, 280, 329, 504, 529, 704, 807, 1216, 1223, 1272, 1321, 1496, 1545, 1888, 2063, 2784, 2809, 2984, 3159, 3784, 3887, 4608, 5017, 6656, 6663, 6712, 6761, 6936, 6985, 7328, 7503, 8224, 8273, 8616, 8959, 10184, 10359, 11584, 12305, 15168, 15193, 15368, 15543, 16168

Offset: 0

Author

Omar E. Pol, Jan 29 2015

Keywords

• nonn

Comments

Also, total number of ON cells after n generations in a three-dimensional cellular automaton where A247666(n) gives the number of ON cells in the n-th level of the structure starting from the top. An ON cell remains ON forever. An ON cell is an hexagonal prism of height 1. We start with a single ON cell. The structure looks like an irregular stepped pyramid, apparently with a like-hexagonal base.

Links

• N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
• Index entries for sequences related to cellular automata

Crossrefs

Cf. A116520, A245542, A247666, A253908.