A325965 - cp's OEIS frontend

A325965 a(n) is the least k >= A020639(n) such that n-k and n-(sigma(n)-k) are relatively prime.

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

[1, 2, 4, 2, 6, 5, 8, 2, 3, 3, 12, 3, 14, 3, 4, 2, 18, 2, 20, 3, 4, 3, 24, 5, 5, 3, 4, 27, 30, 5, 32, 2, 4, 3, 6, 2, 38, 3, 4, 3, 42, 5, 44, 3, 4, 3, 48, 3, 7, 2, 4, 3, 54, 5, 6, 3, 4, 3, 60, 5, 62, 3, 4, 2, 6, 5, 68, 5, 4, 3, 72, 2, 74, 3, 4, 3, 8, 5, 80, 3, 3, 3, 84, 3, 6, 3, 4, 3, 90, 5, 8, 3, 4, 3, 6, 5, 98, 2, 4, 2]

cp's OEIS Frontend

A325965 a(n) is the least k >= A020639(n) such that n-k and n-(sigma(n)-k) are relatively prime.

Table of values

List of values

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

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

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