A206687 - cp's OEIS frontend

A206687 Number of n X 2 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.

n	a(n)
1	1
2	4
3	11
4	36
5	116
6	376
7	1216
8	3936
9	12736
10	41216
11	133376
12	431616
13	1396736
14	4519936
15	14626816
16	47333376
17	153174016
18	495681536
19	1604059136
20	5190844416
21	16797925376
22	54359228416
23	175910158336
24	569257230336
25	1842155094016
26	5961339109376

[1, 4, 11, 36, 116, 376, 1216, 3936, 12736, 41216, 133376, 431616, 1396736, 4519936, 14626816, 47333376, 153174016, 495681536, 1604059136, 5190844416, 16797925376, 54359228416, 175910158336, 569257230336, 1842155094016, 5961339109376]

cp's OEIS Frontend

A206687 Number of n X 2 0..3 arrays with no element equal to another within two positions in the same row or column, and new values 0..3 introduced in row major order.

Table of values

List of values