A199129 - cp's OEIS frontend

A199129 Number of nX4 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.

n	a(n)
1	3
2	12
3	19
4	258
5	1409
6	2836
7	48320
8	295092
9	629776
10	11499816
11	73045294
12	159683856
13	3012721252
14	19537447260
15	43276955012
16	832789320948
17	5471578311520
18	12222775051564
19	238366172778672
20	1580313985819656
21	3551105861275344

[3, 12, 19, 258, 1409, 2836, 48320, 295092, 629776, 11499816, 73045294, 159683856, 3012721252, 19537447260, 43276955012, 832789320948, 5471578311520, 12222775051564, 238366172778672, 1580313985819656, 3551105861275344]

cp's OEIS Frontend

A199129 Number of nX4 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor.

Table of values

List of values