

A335794


Number of ON cells at nth generation in an "UlamWarburton and Friedkin Replicator" hybrid twodimensional cellular automaton.


3



0, 1, 7, 13, 31, 37, 67, 85, 139, 145, 175, 205, 283, 301, 391, 445, 595, 601, 631, 661, 739, 769, 895, 973, 1195, 1213, 1303, 1393, 1627, 1681, 1927, 2077, 2467, 2473, 2503, 2533, 2611, 2641, 2767, 2845, 3067, 3097, 3223, 3349, 3667, 3745, 4111, 4333, 4939, 4957
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OFFSET

0,3


COMMENTS

This 2D CA uses the neighborhood:
[0 X X]
[X X X]
[X X 0]
If a cell has an even number of ON neighbors and it is currently OFF, stay OFF; otherwise turn ON.
The results are similar to those for A151723, but with a distorted grid.
(The "look" keyword refers to the animation.  N. J. A. Sloane, Jul 03 2020)


REFERENCES

S. M. Ulam, On some mathematical problems connected with patterns of growth of figures, pp. 215224 of R. E. Bellman, ed., Mathematical Problems in the Biological Sciences, Proc. Sympos. Applied Math., Vol. 14, Amer. Math. Soc., 1962 (see Example 6, page 224).


LINKS

Table of n, a(n) for n=0..49.
Cody B. Duncan, Animation


CROSSREFS

Cf. A102900, A147562, A151723, A247666, A335795.
Sequence in context: A151723 A046139 A023243 * A331077 A087196 A074963
Adjacent sequences: A335791 A335792 A335793 * A335795 A335796 A335797


KEYWORD

nonn,look


AUTHOR

Cody B Duncan, Jun 23 2020


STATUS

approved



