A281208 - cp's OEIS frontend

A281208 Number of 4 X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	0
2	38
3	168
4	270
5	470
6	804
7	1358
8	2284
9	3834
10	6432
11	10786
12	18080
13	30290
14	50712
15	84838
16	141812
17	236846
18	395228
19	658966
20	1097796
21	1827410
22	3039624
23	5052282
24	8391768
25	13929370
26	23106544
27	38306878
28	63470044
29	105104774
30	173959572
31	287777246

[0, 38, 168, 270, 470, 804, 1358, 2284, 3834, 6432, 10786, 18080, 30290, 50712, 84838, 141812, 236846, 395228, 658966, 1097796, 1827410, 3039624, 5052282, 8391768, 13929370, 23106544, 38306878, 63470044, 105104774, 173959572, 287777246]

cp's OEIS Frontend

A281208 Number of 4 X n 0..1 arrays with no element equal to more than one of its horizontal and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values