A285396 - cp's OEIS frontend

A285396 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; a(n) is the number of cells after n iterations.

n	a(n)
0	1
1	21
2	399
3	7401
4	136227
5	2500437
6	45845895
7	840237393
8	15396839067
9	282119272221
10	5169192919455
11	94712719519353
12	1735370171447763
13	31796203000166949
14	582583421696631159
15	10674336158022192609
16	195579614965832408523
17	3583490696858688375405

[1, 21, 399, 7401, 136227, 2500437, 45845895, 840237393, 15396839067, 282119272221, 5169192919455, 94712719519353, 1735370171447763, 31796203000166949, 582583421696631159, 10674336158022192609, 195579614965832408523, 3583490696858688375405]

cp's OEIS Frontend

A285396 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; a(n) is the number of cells after n iterations.

Table of values

List of values