A215406 - cp's OEIS frontend

A215406 A ranking algorithm for the lexicographic ordering of the Catalan families.

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

[0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2, 3, 3, 3, 3, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4]

cp's OEIS Frontend

A215406 A ranking algorithm for the lexicographic ordering of the Catalan families.

Table of values

List of values

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

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

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