A050338 - cp's OEIS frontend

A050338 Number of ways of factoring n with 2 levels of parentheses.

n	a(n)
1	1
2	1
3	1
4	4
5	1
6	4
7	1
8	10
9	4
10	4
11	1
12	16
13	1
14	4
15	4
16	30
17	1
18	16
19	1
20	16
21	4
22	4
23	1
24	54
25	4
26	4
27	10
28	16
29	1
30	22
31	1
32	75
33	4
34	4
35	4
36	74
37	1
38	4
39	4
40	54
41	1
42	22
43	1
44	16
45	16
46	4
47	1
48	176
49	4
50	16
51	4
52	16
53	1
54	54
55	4
56	54
57	4
58	4
59	1
60	102
61	1
62	4
63	16
64	206
65	4
66	22
67	1
68	16
69	4
70	22
71	1
72	267
73	1
74	4
75	16
76	16
77	4
78	22
79	1
80	176
81	30
82	4
83	1
84	102

[1, 1, 1, 4, 1, 4, 1, 10, 4, 4, 1, 16, 1, 4, 4, 30, 1, 16, 1, 16, 4, 4, 1, 54, 4, 4, 10, 16, 1, 22, 1, 75, 4, 4, 4, 74, 1, 4, 4, 54, 1, 22, 1, 16, 16, 4, 1, 176, 4, 16, 4, 16, 1, 54, 4, 54, 4, 4, 1, 102, 1, 4, 16, 206, 4, 22, 1, 16, 4, 22, 1, 267, 1, 4, 16, 16, 4, 22, 1, 176, 30, 4, 1, 102]

cp's OEIS Frontend

A050338 Number of ways of factoring n with 2 levels of parentheses.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	4
5	1
6	4
7	1
8	10
9	4
10	4
11	1
12	16
13	1
14	4
15	4
16	30
17	1
18	16
19	1
20	16
21	4
22	4
23	1
24	54
25	4
26	4
27	10
28	16
29	1
30	22
31	1
32	75
33	4
34	4
35	4
36	74
37	1
38	4
39	4
40	54
41	1
42	22
43	1
44	16
45	16
46	4
47	1
48	176
49	4
50	16
51	4
52	16
53	1
54	54
55	4
56	54
57	4
58	4
59	1
60	102
61	1
62	4
63	16
64	206
65	4
66	22
67	1
68	16
69	4
70	22
71	1
72	267
73	1
74	4
75	16
76	16
77	4
78	22
79	1
80	176
81	30
82	4
83	1
84	102

n	a(n)
1	1
2	1
3	1
4	4
5	1
6	4
7	1
8	10
9	4
10	4
11	1
12	16
13	1
14	4
15	4
16	30
17	1
18	16
19	1
20	16
21	4
22	4
23	1
24	54
25	4
26	4
27	10
28	16
29	1
30	22
31	1
32	75
33	4
34	4
35	4
36	74
37	1
38	4
39	4
40	54
41	1
42	22
43	1
44	16
45	16
46	4
47	1
48	176
49	4
50	16
51	4
52	16
53	1
54	54
55	4
56	54
57	4
58	4
59	1
60	102
61	1
62	4
63	16
64	206
65	4
66	22
67	1
68	16
69	4
70	22
71	1
72	267
73	1
74	4
75	16
76	16
77	4
78	22
79	1
80	176
81	30
82	4
83	1
84	102

n	a(n)
1	1
2	1
3	1
4	4
5	1
6	4
7	1
8	10
9	4
10	4
11	1
12	16
13	1
14	4
15	4
16	30
17	1
18	16
19	1
20	16
21	4
22	4
23	1
24	54
25	4
26	4
27	10
28	16
29	1
30	22
31	1
32	75
33	4
34	4
35	4
36	74
37	1
38	4
39	4
40	54
41	1
42	22
43	1
44	16
45	16
46	4
47	1
48	176
49	4
50	16
51	4
52	16
53	1
54	54
55	4
56	54
57	4
58	4
59	1
60	102
61	1
62	4
63	16
64	206
65	4
66	22
67	1
68	16
69	4
70	22
71	1
72	267
73	1
74	4
75	16
76	16
77	4
78	22
79	1
80	176
81	30
82	4
83	1
84	102