A325567 - cp's OEIS frontend

A325567 a(1) = 1; for n > 1, a(n) is the largest proper divisor d of n such that A048720(A065621(d),n/d) is equal to n.

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

[1, 1, 1, 2, 1, 2, 1, 4, 3, 2, 1, 4, 1, 2, 1, 8, 1, 6, 1, 4, 3, 2, 1, 8, 1, 2, 1, 4, 1, 2, 1, 16, 11, 2, 5, 12, 1, 2, 1, 8, 1, 6, 1, 4, 3, 2, 1, 16, 7, 2, 1, 4, 1, 2, 1, 8, 1, 2, 1, 4, 1, 2, 1, 32, 13, 22, 1, 4, 1, 10, 1, 24, 1, 2, 5, 4, 1, 2, 1, 16, 1, 2, 1, 12, 1, 2, 1, 8, 1, 6, 1, 4, 3, 2, 1, 32, 1, 14, 1, 4, 1, 2, 1, 8, 7]

cp's OEIS Frontend

A325567 a(1) = 1; for n > 1, a(n) is the largest proper divisor d of n such that A048720(A065621(d),n/d) is equal to n.

Table of values

List of values

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

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

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