A379120 - cp's OEIS frontend

A379120 a(1) = 1; and for n > 1, a(n) is the smallest divisor d > 1 of n such that A048720(A065621(n/d),d) is equal to n.

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

[1, 2, 3, 2, 5, 3, 7, 2, 3, 5, 11, 3, 13, 7, 15, 2, 17, 3, 19, 5, 7, 11, 23, 3, 25, 13, 27, 7, 29, 15, 31, 2, 3, 17, 7, 3, 37, 19, 39, 5, 41, 7, 43, 11, 15, 23, 47, 3, 7, 25, 51, 13, 53, 27, 55, 7, 57, 29, 59, 15, 61, 31, 63, 2, 5, 3, 67, 17, 69, 7, 71, 3, 73, 37, 15, 19, 77, 39, 79, 5, 81, 41, 83, 7, 85, 43, 87, 11, 89]

cp's OEIS Frontend

A379120 a(1) = 1; and for n > 1, a(n) is the smallest divisor d > 1 of n such that A048720(A065621(n/d),d) is equal to n.

Table of values

List of values

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

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

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