A203181 - cp's OEIS frontend

A203181 T(n,k) is the number of n X k 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.

n	a(n)
1	1
2	1
3	1
4	2
5	1
6	2
7	2
8	2
9	2
10	2
11	3
12	4
13	7
14	4
15	3
16	4
17	6
18	17
19	17
20	6
21	4
22	5
23	10
24	41
25	59
26	41
27	10
28	5
29	7
30	18
31	97
32	205
33	205
34	97
35	18
36	7
37	9
38	30
39	235
40	724
41	952
42	724
43	235
44	30
45	9
46	12
47	50
48	607
49	2466
50	4654
51	4654
52	2466
53	607
54	50
55	12
56	16
57	86
58	1415
59	8948
60	23083
61	32411
62	23083
63	8948
64	1415
65	86
66	16
67	21
68	146

[1, 1, 1, 2, 1, 2, 2, 2, 2, 2, 3, 4, 7, 4, 3, 4, 6, 17, 17, 6, 4, 5, 10, 41, 59, 41, 10, 5, 7, 18, 97, 205, 205, 97, 18, 7, 9, 30, 235, 724, 952, 724, 235, 30, 9, 12, 50, 607, 2466, 4654, 4654, 2466, 607, 50, 12, 16, 86, 1415, 8948, 23083, 32411, 23083, 8948, 1415, 86, 16, 21, 146]

cp's OEIS Frontend

A203181 T(n,k) is the number of n X k 0..2 arrays with every 1 immediately preceded by 0 to the left or above, no 0 immediately preceded by a 0, and every 2 immediately preceded by 0 1 to the left or above.

Table of values

List of values