A217467 - cp's OEIS frontend

A217467 a(1) = 1; for n > 1, the maximum exponent k such that n^k divides the double factorial n!!.

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

[1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 1, 1, 2, 3, 1, 2, 1, 2, 2, 1, 1, 5, 2, 1, 2, 2, 1, 3, 1, 6, 2, 1, 3, 4, 1, 1, 2, 4, 1, 3, 1, 2, 6, 1, 1, 10, 2, 3, 2, 2, 1, 4, 3, 4, 2, 1, 1, 7, 1, 1, 6, 10, 3, 3, 1, 2, 2, 5, 1, 8, 1, 1, 5, 2, 4, 3, 1, 9, 5, 1, 1, 6, 3, 1]

cp's OEIS Frontend

A217467 a(1) = 1; for n > 1, the maximum exponent k such that n^k divides the double factorial n!!.

Table of values

List of values

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

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

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