A222879 - cp's OEIS frontend

A222879 Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

n	a(n)
1	2
2	11
3	122
4	1814
5	26311
6	399849
7	6013669
8	91842381
9	1400573929
10	21492587457
11	330100781811
12	5085688832352
13	78450837933529
14	1212393597214424
15	18758126651572197
16	290589347000277975
17	4505965014075887115

[2, 11, 122, 1814, 26311, 399849, 6013669, 91842381, 1400573929, 21492587457, 330100781811, 5085688832352, 78450837933529, 1212393597214424, 18758126651572197, 290589347000277975, 4505965014075887115]

cp's OEIS Frontend

A222879 Number of 2Xn 0..3 arrays with no more than floor(2Xn/2) elements equal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order.

Table of values

List of values