A056061 - cp's OEIS frontend

A056061 Number of square divisors of central binomial coefficients.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	2
10	4
11	1
12	2
13	2
14	2
15	2
16	2
17	1
18	2
19	1
20	2
21	2
22	2
23	1
24	2
25	4
26	4
27	8
28	8
29	4
30	6
31	2
32	2
33	2
34	4
35	2
36	4
37	4
38	4
39	2
40	4
41	2
42	2
43	2
44	2
45	8
46	12
47	4
48	8
49	8
50	8
51	8
52	8
53	4
54	6
55	2
56	2
57	2
58	3
59	2
60	3
61	3
62	3
63	4
64	4
65	2
66	4
67	2
68	4
69	4
70	4
71	1
72	2
73	2
74	2
75	4
76	4
77	8
78	12
79	2
80	4
81	12
82	12
83	4
84	4
85	8
86	12
87	12
88	12
89	4
90	6
91	8
92	12
93	12
94	12
95	8
96	16
97	8
98	8
99	6

[1, 1, 1, 1, 1, 2, 1, 1, 2, 4, 1, 2, 2, 2, 2, 2, 1, 2, 1, 2, 2, 2, 1, 2, 4, 4, 8, 8, 4, 6, 2, 2, 2, 4, 2, 4, 4, 4, 2, 4, 2, 2, 2, 2, 8, 12, 4, 8, 8, 8, 8, 8, 4, 6, 2, 2, 2, 3, 2, 3, 3, 3, 4, 4, 2, 4, 2, 4, 4, 4, 1, 2, 2, 2, 4, 4, 8, 12, 2, 4, 12, 12, 4, 4, 8, 12, 12, 12, 4, 6, 8, 12, 12, 12, 8, 16, 8, 8, 6]

cp's OEIS Frontend

A056061 Number of square divisors of central binomial coefficients.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	2
10	4
11	1
12	2
13	2
14	2
15	2
16	2
17	1
18	2
19	1
20	2
21	2
22	2
23	1
24	2
25	4
26	4
27	8
28	8
29	4
30	6
31	2
32	2
33	2
34	4
35	2
36	4
37	4
38	4
39	2
40	4
41	2
42	2
43	2
44	2
45	8
46	12
47	4
48	8
49	8
50	8
51	8
52	8
53	4
54	6
55	2
56	2
57	2
58	3
59	2
60	3
61	3
62	3
63	4
64	4
65	2
66	4
67	2
68	4
69	4
70	4
71	1
72	2
73	2
74	2
75	4
76	4
77	8
78	12
79	2
80	4
81	12
82	12
83	4
84	4
85	8
86	12
87	12
88	12
89	4
90	6
91	8
92	12
93	12
94	12
95	8
96	16
97	8
98	8
99	6

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	2
10	4
11	1
12	2
13	2
14	2
15	2
16	2
17	1
18	2
19	1
20	2
21	2
22	2
23	1
24	2
25	4
26	4
27	8
28	8
29	4
30	6
31	2
32	2
33	2
34	4
35	2
36	4
37	4
38	4
39	2
40	4
41	2
42	2
43	2
44	2
45	8
46	12
47	4
48	8
49	8
50	8
51	8
52	8
53	4
54	6
55	2
56	2
57	2
58	3
59	2
60	3
61	3
62	3
63	4
64	4
65	2
66	4
67	2
68	4
69	4
70	4
71	1
72	2
73	2
74	2
75	4
76	4
77	8
78	12
79	2
80	4
81	12
82	12
83	4
84	4
85	8
86	12
87	12
88	12
89	4
90	6
91	8
92	12
93	12
94	12
95	8
96	16
97	8
98	8
99	6

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	1
8	1
9	2
10	4
11	1
12	2
13	2
14	2
15	2
16	2
17	1
18	2
19	1
20	2
21	2
22	2
23	1
24	2
25	4
26	4
27	8
28	8
29	4
30	6
31	2
32	2
33	2
34	4
35	2
36	4
37	4
38	4
39	2
40	4
41	2
42	2
43	2
44	2
45	8
46	12
47	4
48	8
49	8
50	8
51	8
52	8
53	4
54	6
55	2
56	2
57	2
58	3
59	2
60	3
61	3
62	3
63	4
64	4
65	2
66	4
67	2
68	4
69	4
70	4
71	1
72	2
73	2
74	2
75	4
76	4
77	8
78	12
79	2
80	4
81	12
82	12
83	4
84	4
85	8
86	12
87	12
88	12
89	4
90	6
91	8
92	12
93	12
94	12
95	8
96	16
97	8
98	8
99	6