A285400 - cp's OEIS frontend

A285400 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 0 or 3; a(n) is the number of cells after n iterations.

n	a(n)
0	1
1	18
2	378
3	7938
4	166698
5	3500658
6	73513818
7	1543790178
8	32419593738
9	680811468498
10	14297040838458
11	300237857607618
12	6304995009759978
13	132404895204959538
14	2780502799304150298
15	58390558785387156258
16	1226201734493130281418
17	25750236424355735909778

[1, 18, 378, 7938, 166698, 3500658, 73513818, 1543790178, 32419593738, 680811468498, 14297040838458, 300237857607618, 6304995009759978, 132404895204959538, 2780502799304150298, 58390558785387156258, 1226201734493130281418, 25750236424355735909778]

cp's OEIS Frontend

A285400 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 0 or 3; a(n) is the number of cells after n iterations.

Table of values

List of values