A254460 - cp's OEIS frontend

A254460 a(n) is the number of predecessors of the all-ones state of the binary cellular automaton on the n X n grid graph with edges joining diagonal neighbors as well as vertical and horizontal neighbors, whose local rule is f(i,j) = sum of the state at vertex (i,j) and the states at all of its neighbors mod 2.

n	a(n)
1	1
2	8
3	1
4	1
5	512
6	1
7	1
8	32768
9	1
10	1
11	2097152
12	1
13	1
14	134217728
15	1
16	1
17	8589934592
18	1
19	1
20	549755813888
21	1
22	1
23	35184372088832
24	1
25	1
26	2251799813685248
27	1
28	1
29	144115188075855872
30	1

[1, 8, 1, 1, 512, 1, 1, 32768, 1, 1, 2097152, 1, 1, 134217728, 1, 1, 8589934592, 1, 1, 549755813888, 1, 1, 35184372088832, 1, 1, 2251799813685248, 1, 1, 144115188075855872, 1]

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Table of values

List of values