A285393 - cp's OEIS frontend

A285393 Start with a single cell at coordinates (0, 0, 0), then iteratively subdivide the grid into 3 X 3 X 3 cells and remove the cells whose sum of modulo 2 coordinates is 2 or 3; a(n) is the number of cells after n iterations.

n	a(n)
0	1
1	20
2	352
3	6080
4	104704
5	1802240
6	31019008
7	533872640
8	9188540416
9	158144921600
10	2721848492032
11	46846013603840
12	806271544459264
13	13876822236200960
14	238835410589974528
15	4110620744461844480
16	70748315180918112256
17	1217656507884193710080
18	20957211028999804813312

[1, 20, 352, 6080, 104704, 1802240, 31019008, 533872640, 9188540416, 158144921600, 2721848492032, 46846013603840, 806271544459264, 13876822236200960, 238835410589974528, 4110620744461844480, 70748315180918112256, 1217656507884193710080, 20957211028999804813312]

cp's OEIS Frontend

A285393 Start with a single cell at coordinates (0, 0, 0), then iteratively subdivide the grid into 3 X 3 X 3 cells and remove the cells whose sum of modulo 2 coordinates is 2 or 3; a(n) is the number of cells after n iterations.

Table of values

List of values