A281050 - cp's OEIS frontend

A281050 Number of n X 2 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	0
2	1
3	6
4	29
5	122
6	468
7	1686
8	5807
9	19338
10	62731
11	199264
12	622152
13	1914780
14	5821645
15	17515566
16	52221929
17	154461110
18	453654108
19	1324053522
20	3842768987
21	11096398578
22	31895230903
23	91296545404
24	260329675536
25	739725018360
26	2095147333465

[0, 1, 6, 29, 122, 468, 1686, 5807, 19338, 62731, 199264, 622152, 1914780, 5821645, 17515566, 52221929, 154461110, 453654108, 1324053522, 3842768987, 11096398578, 31895230903, 91296545404, 260329675536, 739725018360, 2095147333465]

cp's OEIS Frontend

A281050 Number of n X 2 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values