A370884 - cp's OEIS frontend

A370884 Irregular triangle read by rows: T(n,k) is the number of unmatched left parentheses in the k-th string of parentheses of length n, where strings within a row are in reverse lexicographical order.

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

[0, 0, 1, 0, 1, 0, 2, 0, 1, 0, 2, 0, 1, 1, 3, 0, 1, 0, 2, 0, 1, 1, 3, 0, 1, 0, 2, 0, 2, 2, 4, 0, 1, 0, 2, 0, 1, 1, 3, 0, 1, 0, 2, 0, 2, 2, 4, 0, 1, 0, 2, 0, 1, 1, 3, 0, 1, 1, 3, 1, 3, 3, 5, 0, 1, 0, 2, 0, 1, 1, 3, 0, 1, 0, 2, 0, 2, 2, 4, 0, 1, 0, 2, 0, 1, 1, 3, 0]

cp's OEIS Frontend

A370884 Irregular triangle read by rows: T(n,k) is the number of unmatched left parentheses in the k-th string of parentheses of length n, where strings within a row are in reverse lexicographical order.

Table of values

List of values

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

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

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