A068913 - cp's OEIS frontend

A068913 Square array read by antidiagonals of number of k step walks (each step +-1 starting from 0) which are never more than n or less than -n.

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	0
7	2
8	2
9	1
10	0
11	4
12	4
13	2
14	1
15	0
16	4
17	6
18	4
19	2
20	1
21	0
22	8
23	12
24	8
25	4
26	2
27	1
28	0
29	8
30	18
31	14
32	8
33	4
34	2
35	1
36	0
37	16
38	36
39	28
40	16
41	8
42	4
43	2
44	1
45	0
46	16
47	54
48	48
49	30
50	16
51	8
52	4
53	2
54	1
55	0
56	32
57	108
58	96
59	60
60	32
61	16
62	8
63	4
64	2
65	1
66	0
67	32
68	162
69	164
70	110
71	62
72	32
73	16
74	8
75	4
76	2
77	1
78	0
79	64
80	324
81	328
82	220
83	124
84	64
85	32
86	16
87	8
88	4
89	2
90	1

[1, 0, 1, 0, 2, 1, 0, 2, 2, 1, 0, 4, 4, 2, 1, 0, 4, 6, 4, 2, 1, 0, 8, 12, 8, 4, 2, 1, 0, 8, 18, 14, 8, 4, 2, 1, 0, 16, 36, 28, 16, 8, 4, 2, 1, 0, 16, 54, 48, 30, 16, 8, 4, 2, 1, 0, 32, 108, 96, 60, 32, 16, 8, 4, 2, 1, 0, 32, 162, 164, 110, 62, 32, 16, 8, 4, 2, 1, 0, 64, 324, 328, 220, 124, 64, 32, 16, 8, 4, 2, 1]

cp's OEIS Frontend

A068913 Square array read by antidiagonals of number of k step walks (each step +-1 starting from 0) which are never more than n or less than -n.

Table of values

List of values

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	0
7	2
8	2
9	1
10	0
11	4
12	4
13	2
14	1
15	0
16	4
17	6
18	4
19	2
20	1
21	0
22	8
23	12
24	8
25	4
26	2
27	1
28	0
29	8
30	18
31	14
32	8
33	4
34	2
35	1
36	0
37	16
38	36
39	28
40	16
41	8
42	4
43	2
44	1
45	0
46	16
47	54
48	48
49	30
50	16
51	8
52	4
53	2
54	1
55	0
56	32
57	108
58	96
59	60
60	32
61	16
62	8
63	4
64	2
65	1
66	0
67	32
68	162
69	164
70	110
71	62
72	32
73	16
74	8
75	4
76	2
77	1
78	0
79	64
80	324
81	328
82	220
83	124
84	64
85	32
86	16
87	8
88	4
89	2
90	1

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	0
7	2
8	2
9	1
10	0
11	4
12	4
13	2
14	1
15	0
16	4
17	6
18	4
19	2
20	1
21	0
22	8
23	12
24	8
25	4
26	2
27	1
28	0
29	8
30	18
31	14
32	8
33	4
34	2
35	1
36	0
37	16
38	36
39	28
40	16
41	8
42	4
43	2
44	1
45	0
46	16
47	54
48	48
49	30
50	16
51	8
52	4
53	2
54	1
55	0
56	32
57	108
58	96
59	60
60	32
61	16
62	8
63	4
64	2
65	1
66	0
67	32
68	162
69	164
70	110
71	62
72	32
73	16
74	8
75	4
76	2
77	1
78	0
79	64
80	324
81	328
82	220
83	124
84	64
85	32
86	16
87	8
88	4
89	2
90	1

n	a(n)
0	1
1	0
2	1
3	0
4	2
5	1
6	0
7	2
8	2
9	1
10	0
11	4
12	4
13	2
14	1
15	0
16	4
17	6
18	4
19	2
20	1
21	0
22	8
23	12
24	8
25	4
26	2
27	1
28	0
29	8
30	18
31	14
32	8
33	4
34	2
35	1
36	0
37	16
38	36
39	28
40	16
41	8
42	4
43	2
44	1
45	0
46	16
47	54
48	48
49	30
50	16
51	8
52	4
53	2
54	1
55	0
56	32
57	108
58	96
59	60
60	32
61	16
62	8
63	4
64	2
65	1
66	0
67	32
68	162
69	164
70	110
71	62
72	32
73	16
74	8
75	4
76	2
77	1
78	0
79	64
80	324
81	328
82	220
83	124
84	64
85	32
86	16
87	8
88	4
89	2
90	1