A222584 - cp's OEIS frontend

A222584 Number of nX4 0..2 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.

n	a(n)
1	4
2	18
3	112
4	1087
5	11442
6	128213
7	1471412
8	17068476
9	198654710
10	2328829654
11	27335961632
12	322535055233
13	3807753230632
14	45124599083917
15	535113331694641
16	6363369440619695
17	75729209656948170
18	903078623804307816

[4, 18, 112, 1087, 11442, 128213, 1471412, 17068476, 198654710, 2328829654, 27335961632, 322535055233, 3807753230632, 45124599083917, 535113331694641, 6363369440619695, 75729209656948170, 903078623804307816]

cp's OEIS Frontend

A222584 Number of nX4 0..2 arrays with no more than floor(nX4/2) elements unequal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..2 order.

Table of values

List of values