A285395 - cp's OEIS frontend

A285395 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 1; a(n) is the number of cells after n iterations.

n	a(n)
0	1
1	15
2	249
3	4371
4	78693
5	1431735
6	26159649
7	478778379
8	8768545197
9	160633207887
10	2942987702217
11	53921188767939
12	987955842925365
13	18101659807680423
14	331665550405417905
15	6076909441961837115
16	111343619823563404797
17	2040083652208572498111
18	37379255055440801236953

[1, 15, 249, 4371, 78693, 1431735, 26159649, 478778379, 8768545197, 160633207887, 2942987702217, 53921188767939, 987955842925365, 18101659807680423, 331665550405417905, 6076909441961837115, 111343619823563404797, 2040083652208572498111, 37379255055440801236953]

cp's OEIS Frontend

A285395 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 1; a(n) is the number of cells after n iterations.

Table of values

List of values