A325972 - cp's OEIS frontend

A325972 a(n) is the largest k <= sigma(n)-A007947(n) such that n-k and n-(sigma(n)-k) are relatively prime.

n	a(n)
1	0
2	1
3	0
4	5
5	0
6	5
7	0
8	13
9	10
10	7
11	0
12	21
13	0
14	9
15	8
16	29
17	0
18	32
19	0
20	31
21	10
22	13
23	0
24	53
25	26
26	15
27	36
28	29
29	0
30	41
31	0
32	61
33	14
34	19
35	12
36	85
37	0
38	21
39	16
40	79
41	0
42	53
43	0
44	61
45	62
46	25
47	0
48	117
49	50
50	83
51	20
52	71
53	0
54	113
55	16
56	105
57	22
58	31
59	0
60	137
61	0
62	33
63	82
64	125
65	18
66	77
67	0
68	91
69	26
70	73
71	0
72	188
73	0
74	39
75	108
76	101
77	18
78	89
79	0
80	175
81	118
82	43
83	0
84	181
85	22

[0, 1, 0, 5, 0, 5, 0, 13, 10, 7, 0, 21, 0, 9, 8, 29, 0, 32, 0, 31, 10, 13, 0, 53, 26, 15, 36, 29, 0, 41, 0, 61, 14, 19, 12, 85, 0, 21, 16, 79, 0, 53, 0, 61, 62, 25, 0, 117, 50, 83, 20, 71, 0, 113, 16, 105, 22, 31, 0, 137, 0, 33, 82, 125, 18, 77, 0, 91, 26, 73, 0, 188, 0, 39, 108, 101, 18, 89, 0, 175, 118, 43, 0, 181, 22]

cp's OEIS Frontend

A325972 a(n) is the largest k <= sigma(n)-A007947(n) such that n-k and n-(sigma(n)-k) are relatively prime.

Table of values

List of values

n	a(n)
1	0
2	1
3	0
4	5
5	0
6	5
7	0
8	13
9	10
10	7
11	0
12	21
13	0
14	9
15	8
16	29
17	0
18	32
19	0
20	31
21	10
22	13
23	0
24	53
25	26
26	15
27	36
28	29
29	0
30	41
31	0
32	61
33	14
34	19
35	12
36	85
37	0
38	21
39	16
40	79
41	0
42	53
43	0
44	61
45	62
46	25
47	0
48	117
49	50
50	83
51	20
52	71
53	0
54	113
55	16
56	105
57	22
58	31
59	0
60	137
61	0
62	33
63	82
64	125
65	18
66	77
67	0
68	91
69	26
70	73
71	0
72	188
73	0
74	39
75	108
76	101
77	18
78	89
79	0
80	175
81	118
82	43
83	0
84	181
85	22

n	a(n)
1	0
2	1
3	0
4	5
5	0
6	5
7	0
8	13
9	10
10	7
11	0
12	21
13	0
14	9
15	8
16	29
17	0
18	32
19	0
20	31
21	10
22	13
23	0
24	53
25	26
26	15
27	36
28	29
29	0
30	41
31	0
32	61
33	14
34	19
35	12
36	85
37	0
38	21
39	16
40	79
41	0
42	53
43	0
44	61
45	62
46	25
47	0
48	117
49	50
50	83
51	20
52	71
53	0
54	113
55	16
56	105
57	22
58	31
59	0
60	137
61	0
62	33
63	82
64	125
65	18
66	77
67	0
68	91
69	26
70	73
71	0
72	188
73	0
74	39
75	108
76	101
77	18
78	89
79	0
80	175
81	118
82	43
83	0
84	181
85	22

n	a(n)
1	0
2	1
3	0
4	5
5	0
6	5
7	0
8	13
9	10
10	7
11	0
12	21
13	0
14	9
15	8
16	29
17	0
18	32
19	0
20	31
21	10
22	13
23	0
24	53
25	26
26	15
27	36
28	29
29	0
30	41
31	0
32	61
33	14
34	19
35	12
36	85
37	0
38	21
39	16
40	79
41	0
42	53
43	0
44	61
45	62
46	25
47	0
48	117
49	50
50	83
51	20
52	71
53	0
54	113
55	16
56	105
57	22
58	31
59	0
60	137
61	0
62	33
63	82
64	125
65	18
66	77
67	0
68	91
69	26
70	73
71	0
72	188
73	0
74	39
75	108
76	101
77	18
78	89
79	0
80	175
81	118
82	43
83	0
84	181
85	22