A285392 - cp's OEIS frontend

A285392 Start with a single cell at coordinates (0, 0), then iteratively subdivide the grid into 3 X 3 cells and remove the cells whose sum of modulo 2 coordinates is 0; a(n) is the number of cells after n iterations.

n	a(n)
0	1
1	5
2	36
3	264
4	1944
5	14328
6	105624
7	778680
8	5740632
9	42321528
10	312006168
11	2300197176
12	16957700568
13	125016939000
14	921660044184
15	6794737129656
16	50092713636696
17	369297577174392
18	2722565630929176
19	20071519752269880
20	147972890199278808
21	1090897774766270712

[1, 5, 36, 264, 1944, 14328, 105624, 778680, 5740632, 42321528, 312006168, 2300197176, 16957700568, 125016939000, 921660044184, 6794737129656, 50092713636696, 369297577174392, 2722565630929176, 20071519752269880, 147972890199278808, 1090897774766270712]

cp's OEIS Frontend

A285392 Start with a single cell at coordinates (0, 0), then iteratively subdivide the grid into 3 X 3 cells and remove the cells whose sum of modulo 2 coordinates is 0; a(n) is the number of cells after n iterations.

Table of values

List of values