A221404 - cp's OEIS frontend

A221404 Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with every occupancy equal to zero or two.

n	a(n)
1	0
2	16
3	0
4	436
5	0
6	12668
7	0
8	368268
9	0
10	10705360
11	0
12	311197280
13	0
14	9046269888
15	0
16	262968117056
17	0
18	7644280337936
19	0
20	222213327464336
21	0
22	6459569820912704
23	0
24	187774705858714240
25	0
26	5458465675503960896
27	0
28	158673381440822516672
29	0

[0, 16, 0, 436, 0, 12668, 0, 368268, 0, 10705360, 0, 311197280, 0, 9046269888, 0, 262968117056, 0, 7644280337936, 0, 222213327464336, 0, 6459569820912704, 0, 187774705858714240, 0, 5458465675503960896, 0, 158673381440822516672, 0]

cp's OEIS Frontend

A221404 Number of nX3 arrays of occupancy after each element stays put or moves to some horizontal or vertical neighbor, with every occupancy equal to zero or two.

Table of values

List of values