A325817 - cp's OEIS frontend

A325817 a(n) is the least k >= 0 such that n-k and n-(sigma(n)-k) are relatively prime.

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	5
7	0
8	0
9	0
10	1
11	0
12	1
13	0
14	1
15	2
16	0
17	0
18	1
19	0
20	1
21	0
22	1
23	0
24	1
25	0
26	3
27	0
28	27
29	0
30	1
31	0
32	0
33	2
34	1
35	0
36	0
37	0
38	1
39	0
40	1
41	0
42	1
43	0
44	1
45	2
46	3
47	0
48	1
49	0
50	0
51	2
52	3
53	0
54	1
55	0
56	1
57	0
58	1
59	0
60	1
61	0
62	1
63	0
64	0
65	0
66	1
67	0
68	1
69	2
70	1
71	0
72	1
73	0
74	1
75	0
76	3
77	0
78	1
79	0
80	1
81	0
82	1
83	0
84	1
85	0
86	3
87	2
88	1
89	0
90	1
91	2
92	1
93	0
94	1
95	2
96	5
97	0
98	0
99	2
100	0
101	0
102	1
103	0
104	1
105	2

[0, 0, 0, 0, 0, 5, 0, 0, 0, 1, 0, 1, 0, 1, 2, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 3, 0, 27, 0, 1, 0, 0, 2, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 2, 3, 0, 1, 0, 0, 2, 3, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 2, 1, 0, 1, 0, 1, 0, 3, 0, 1, 0, 1, 0, 1, 0, 1, 0, 3, 2, 1, 0, 1, 2, 1, 0, 1, 2, 5, 0, 0, 2, 0, 0, 1, 0, 1, 2]

cp's OEIS Frontend

A325817 a(n) is the least k >= 0 such that n-k and n-(sigma(n)-k) are relatively prime.

Table of values

List of values

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	5
7	0
8	0
9	0
10	1
11	0
12	1
13	0
14	1
15	2
16	0
17	0
18	1
19	0
20	1
21	0
22	1
23	0
24	1
25	0
26	3
27	0
28	27
29	0
30	1
31	0
32	0
33	2
34	1
35	0
36	0
37	0
38	1
39	0
40	1
41	0
42	1
43	0
44	1
45	2
46	3
47	0
48	1
49	0
50	0
51	2
52	3
53	0
54	1
55	0
56	1
57	0
58	1
59	0
60	1
61	0
62	1
63	0
64	0
65	0
66	1
67	0
68	1
69	2
70	1
71	0
72	1
73	0
74	1
75	0
76	3
77	0
78	1
79	0
80	1
81	0
82	1
83	0
84	1
85	0
86	3
87	2
88	1
89	0
90	1
91	2
92	1
93	0
94	1
95	2
96	5
97	0
98	0
99	2
100	0
101	0
102	1
103	0
104	1
105	2

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	5
7	0
8	0
9	0
10	1
11	0
12	1
13	0
14	1
15	2
16	0
17	0
18	1
19	0
20	1
21	0
22	1
23	0
24	1
25	0
26	3
27	0
28	27
29	0
30	1
31	0
32	0
33	2
34	1
35	0
36	0
37	0
38	1
39	0
40	1
41	0
42	1
43	0
44	1
45	2
46	3
47	0
48	1
49	0
50	0
51	2
52	3
53	0
54	1
55	0
56	1
57	0
58	1
59	0
60	1
61	0
62	1
63	0
64	0
65	0
66	1
67	0
68	1
69	2
70	1
71	0
72	1
73	0
74	1
75	0
76	3
77	0
78	1
79	0
80	1
81	0
82	1
83	0
84	1
85	0
86	3
87	2
88	1
89	0
90	1
91	2
92	1
93	0
94	1
95	2
96	5
97	0
98	0
99	2
100	0
101	0
102	1
103	0
104	1
105	2

n	a(n)
1	0
2	0
3	0
4	0
5	0
6	5
7	0
8	0
9	0
10	1
11	0
12	1
13	0
14	1
15	2
16	0
17	0
18	1
19	0
20	1
21	0
22	1
23	0
24	1
25	0
26	3
27	0
28	27
29	0
30	1
31	0
32	0
33	2
34	1
35	0
36	0
37	0
38	1
39	0
40	1
41	0
42	1
43	0
44	1
45	2
46	3
47	0
48	1
49	0
50	0
51	2
52	3
53	0
54	1
55	0
56	1
57	0
58	1
59	0
60	1
61	0
62	1
63	0
64	0
65	0
66	1
67	0
68	1
69	2
70	1
71	0
72	1
73	0
74	1
75	0
76	3
77	0
78	1
79	0
80	1
81	0
82	1
83	0
84	1
85	0
86	3
87	2
88	1
89	0
90	1
91	2
92	1
93	0
94	1
95	2
96	5
97	0
98	0
99	2
100	0
101	0
102	1
103	0
104	1
105	2