A307584 - cp's OEIS frontend

A307584 Triangle read by rows: T(n,k) is the number of non-backtracking walks on Z^2 of length n that are active for k steps, where the walk is initially active and turns in the walk toggle the activity.

n	a(n)
1	1
2	2
3	1
4	2
5	6
6	1
7	2
8	14
9	10
10	1
11	2
12	22
13	42
14	14
15	1
16	2
17	30
18	106
19	86
20	18
21	1
22	2
23	38
24	202
25	318
26	146
27	22
28	1
29	2
30	46
31	330
32	838
33	722
34	222
35	26
36	1
37	2
38	54
39	490
40	1774
41	2514
42	1382
43	314
44	30
45	1
46	2
47	62
48	682
49	3254
50	6802
51	6062
52	2362
53	422
54	34
55	1
56	2
57	70
58	906
59	5406
60	15378
61	20406
62	12570
63	20406
64	12570
65	3726
66	546
67	38
68	1

[1, 2, 1, 2, 6, 1, 2, 14, 10, 1, 2, 22, 42, 14, 1, 2, 30, 106, 86, 18, 1, 2, 38, 202, 318, 146, 22, 1, 2, 46, 330, 838, 722, 222, 26, 1, 2, 54, 490, 1774, 2514, 1382, 314, 30, 1, 2, 62, 682, 3254, 6802, 6062, 2362, 422, 34, 1, 2, 70, 906, 5406, 15378, 20406, 12570, 20406, 12570, 3726, 546, 38, 1]

cp's OEIS Frontend

A307584 Triangle read by rows: T(n,k) is the number of non-backtracking walks on Z^2 of length n that are active for k steps, where the walk is initially active and turns in the walk toggle the activity.

Table of values

List of values