A280550 - cp's OEIS frontend

A280550 Number of n X 4 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

n	a(n)
1	1
2	34
3	144
4	382
5	832
6	1666
7	3182
8	5886
9	10680
10	19122
11	33920
12	59754
13	104690
14	182598
15	317264
16	549398
17	948528
18	1633186
19	2805094
20	4807006
21	8220440
22	14030634
23	23904656
24	40659818
25	69051850
26	117099910
27	198312144
28	335420782
29	566645728
30	956190466

[1, 34, 144, 382, 832, 1666, 3182, 5886, 10680, 19122, 33920, 59754, 104690, 182598, 317264, 549398, 948528, 1633186, 2805094, 4807006, 8220440, 14030634, 23904656, 40659818, 69051850, 117099910, 198312144, 335420782, 566645728, 956190466]

cp's OEIS Frontend

A280550 Number of n X 4 0..1 arrays with no element equal to more than one of its horizontal and vertical neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

Table of values

List of values