A197049 - cp's OEIS frontend

A197049 Number of n X 3 0..4 arrays with each element equal to the number its horizontal and vertical zero neighbors.

n	a(n)
0	1
1	2
2	4
3	10
4	18
5	38
6	78
7	156
8	320
9	654
10	1326
11	2706
12	5518
13	11228
14	22884
15	46634
16	94978
17	193518
18	394286
19	803220
20	1636448
21	3334030
22	6792334
23	13838202
24	28192958
25	57437684
26	117018884
27	238404906
28	485705682
29	989536598
30	2016000430
31	4107230284
32	8367729920
33	17047719214

[1, 2, 4, 10, 18, 38, 78, 156, 320, 654, 1326, 2706, 5518, 11228, 22884, 46634, 94978, 193518, 394286, 803220, 1636448, 3334030, 6792334, 13838202, 28192958, 57437684, 117018884, 238404906, 485705682, 989536598, 2016000430, 4107230284, 8367729920, 17047719214]

cp's OEIS Frontend

A197049 Number of n X 3 0..4 arrays with each element equal to the number its horizontal and vertical zero neighbors.

Table of values

List of values