A233726 - cp's OEIS frontend

A233726 Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal.

n	a(n)
1	40
2	148
3	556
4	2104
5	7976
6	30260
7	114820
8	435720
9	1653488
10	6274804
11	23812172
12	90364680
13	342924296
14	1301361476
15	4938528804
16	18741194360
17	71120848176
18	269896091748
19	1024227097996
20	3886833426776
21	14750121431720
22	55975149559572

[40, 148, 556, 2104, 7976, 30260, 114820, 435720, 1653488, 6274804, 23812172, 90364680, 342924296, 1301361476, 4938528804, 18741194360, 71120848176, 269896091748, 1024227097996, 3886833426776, 14750121431720, 55975149559572]

cp's OEIS Frontend

A233726 Number of (n+1) X (1+1) 0..3 arrays with every 2 X 2 subblock having the sum of the absolute values of the edge differences equal to 6 and no adjacent elements equal.

Table of values

List of values