A123519 - cp's OEIS frontend

A123519 Triangle read by rows: T(n,k) number of tilings of a 2n X 3 grid by dominoes, 2k of which are in a vertical position (0<=k<=n).

n	a(n)
0	1
1	1
2	2
3	1
4	6
5	4
6	1
7	12
8	20
9	8
10	1
11	20
12	60
13	56
14	16
15	1
16	30
17	140
18	224
19	144
20	32
21	1
22	42
23	280
24	672
25	720
26	352
27	64
28	1
29	56
30	504
31	1680
32	2640
33	2112
34	832
35	128
36	1
37	72
38	840
39	3696
40	7920
41	9152
42	5824
43	1920
44	256
45	1
46	90
47	1320
48	7392
49	20592
50	32032
51	29120
52	15360
53	4352
54	512
55	1
56	110
57	1980
58	13728
59	48048
60	96096
61	116480
62	87040
63	39168
64	9728
65	1024

[1, 1, 2, 1, 6, 4, 1, 12, 20, 8, 1, 20, 60, 56, 16, 1, 30, 140, 224, 144, 32, 1, 42, 280, 672, 720, 352, 64, 1, 56, 504, 1680, 2640, 2112, 832, 128, 1, 72, 840, 3696, 7920, 9152, 5824, 1920, 256, 1, 90, 1320, 7392, 20592, 32032, 29120, 15360, 4352, 512, 1, 110, 1980, 13728, 48048, 96096, 116480, 87040, 39168, 9728, 1024]

cp's OEIS Frontend

A123519 Triangle read by rows: T(n,k) number of tilings of a 2n X 3 grid by dominoes, 2k of which are in a vertical position (0<=k<=n).

Table of values

List of values