A222575 - cp's OEIS frontend

A222575 Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

n	a(n)
1	5
2	5
3	11
4	56
5	134
6	1500
7	3999
8	46250
9	126987
10	1462034
11	4136257
12	46688904
13	136406909
14	1501835282
15	4510551635
16	48637741544
17	149382874117
18	1583951305266
19	4954925376243
20	51834151640684
21	164570402519621
22	1703435934148924

[5, 5, 11, 56, 134, 1500, 3999, 46250, 126987, 1462034, 4136257, 46688904, 136406909, 1501835282, 4510551635, 48637741544, 149382874117, 1583951305266, 4954925376243, 51834151640684, 164570402519621, 1703435934148924]

cp's OEIS Frontend

A222575 Number of 3Xn 0..2 arrays with no more than floor(3Xn/2) elements unequal to at least one horizontal, diagonal or antidiagonal neighbor, with new values introduced in row major 0..2 order.

Table of values

List of values