A055215 - cp's OEIS frontend

A055215 A path-counting array, read by rows: T(i,j)=number of paths from (0,0) to (i-j,j) using steps (1 unit right and 1 unit up) or (1 unit right and 2 units up).

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

[1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2, 1, 1, 1, 2, 3, 2, 1, 1, 1, 2, 3, 4, 2, 1, 1, 1, 2, 3, 5, 4, 2, 1, 1, 1, 2, 3, 5, 7, 4, 2, 1, 1, 1, 2, 3, 5, 8, 8, 4, 2, 1, 1, 1, 2, 3, 5, 8, 12, 8, 4, 2, 1, 1, 1, 2, 3, 5, 8, 13, 15, 8, 4, 2, 1, 1, 1, 2, 3, 5, 8, 13, 20, 16]

cp's OEIS Frontend

A055215 A path-counting array, read by rows: T(i,j)=number of paths from (0,0) to (i-j,j) using steps (1 unit right and 1 unit up) or (1 unit right and 2 units up).

Table of values

List of values

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

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

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