A084217 - cp's OEIS frontend

A084217 Number of k's 1 <= k <= n dividing the numerator of 2n-th Bernoulli number.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	2
8	1
9	1
10	1
11	2
12	1
13	2
14	2
15	2
16	1
17	2
18	1
19	2
20	1
21	1
22	2
23	2
24	1
25	3
26	2
27	1
28	2
29	2
30	1
31	2
32	1
33	2
34	2
35	4
36	1
37	2
38	2
39	2
40	1
41	2
42	1
43	2
44	2
45	2
46	2
47	2
48	1
49	3
50	1
51	2
52	3
53	2
54	1
55	2
56	2
57	2
58	2
59	2
60	1
61	2
62	2
63	1
64	1
65	4
66	2
67	2
68	2
69	2
70	3
71	2
72	1
73	2
74	2
75	3
76	2
77	4
78	1
79	2
80	2
81	1
82	2
83	2
84	1
85	4
86	2
87	2
88	3
89	2
90	1
91	4
92	2
93	2
94	2
95	5
96	1
97	2
98	3
99	2
100	1
101	2
102	2
103	2
104	2
105	2

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

cp's OEIS Frontend

A084217 Number of k's 1 <= k <= n dividing the numerator of 2n-th Bernoulli number.

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	2
8	1
9	1
10	1
11	2
12	1
13	2
14	2
15	2
16	1
17	2
18	1
19	2
20	1
21	1
22	2
23	2
24	1
25	3
26	2
27	1
28	2
29	2
30	1
31	2
32	1
33	2
34	2
35	4
36	1
37	2
38	2
39	2
40	1
41	2
42	1
43	2
44	2
45	2
46	2
47	2
48	1
49	3
50	1
51	2
52	3
53	2
54	1
55	2
56	2
57	2
58	2
59	2
60	1
61	2
62	2
63	1
64	1
65	4
66	2
67	2
68	2
69	2
70	3
71	2
72	1
73	2
74	2
75	3
76	2
77	4
78	1
79	2
80	2
81	1
82	2
83	2
84	1
85	4
86	2
87	2
88	3
89	2
90	1
91	4
92	2
93	2
94	2
95	5
96	1
97	2
98	3
99	2
100	1
101	2
102	2
103	2
104	2
105	2

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	2
8	1
9	1
10	1
11	2
12	1
13	2
14	2
15	2
16	1
17	2
18	1
19	2
20	1
21	1
22	2
23	2
24	1
25	3
26	2
27	1
28	2
29	2
30	1
31	2
32	1
33	2
34	2
35	4
36	1
37	2
38	2
39	2
40	1
41	2
42	1
43	2
44	2
45	2
46	2
47	2
48	1
49	3
50	1
51	2
52	3
53	2
54	1
55	2
56	2
57	2
58	2
59	2
60	1
61	2
62	2
63	1
64	1
65	4
66	2
67	2
68	2
69	2
70	3
71	2
72	1
73	2
74	2
75	3
76	2
77	4
78	1
79	2
80	2
81	1
82	2
83	2
84	1
85	4
86	2
87	2
88	3
89	2
90	1
91	4
92	2
93	2
94	2
95	5
96	1
97	2
98	3
99	2
100	1
101	2
102	2
103	2
104	2
105	2

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	1
7	2
8	1
9	1
10	1
11	2
12	1
13	2
14	2
15	2
16	1
17	2
18	1
19	2
20	1
21	1
22	2
23	2
24	1
25	3
26	2
27	1
28	2
29	2
30	1
31	2
32	1
33	2
34	2
35	4
36	1
37	2
38	2
39	2
40	1
41	2
42	1
43	2
44	2
45	2
46	2
47	2
48	1
49	3
50	1
51	2
52	3
53	2
54	1
55	2
56	2
57	2
58	2
59	2
60	1
61	2
62	2
63	1
64	1
65	4
66	2
67	2
68	2
69	2
70	3
71	2
72	1
73	2
74	2
75	3
76	2
77	4
78	1
79	2
80	2
81	1
82	2
83	2
84	1
85	4
86	2
87	2
88	3
89	2
90	1
91	4
92	2
93	2
94	2
95	5
96	1
97	2
98	3
99	2
100	1
101	2
102	2
103	2
104	2
105	2