A325966 - cp's OEIS frontend

A325966 a(n) is the largest i <= sigma(n)-A020639(n) such that n-i and n-(sigma(n)-i) are relatively prime.

n	a(n)
1	0
2	1
3	0
4	5
5	0
6	7
7	0
8	13
9	10
10	15
11	0
12	25
13	0
14	21
15	20
16	29
17	0
18	37
19	0
20	39
21	28
22	33
23	0
24	55
25	26
26	39
27	36
28	29
29	0
30	67
31	0
32	61
33	44
34	51
35	42
36	89
37	0
38	57
39	52
40	87
41	0
42	91
43	0
44	81
45	74
46	69
47	0
48	121
49	50
50	91
51	68
52	95
53	0
54	115
55	66
56	117
57	76
58	87
59	0
60	163
61	0
62	93
63	100
64	125
65	78
66	139
67	0
68	121
69	92
70	141
71	0
72	193
73	0
74	111
75	120
76	137
77	88
78	163
79	0
80	183
81	118
82	123
83	0

[0, 1, 0, 5, 0, 7, 0, 13, 10, 15, 0, 25, 0, 21, 20, 29, 0, 37, 0, 39, 28, 33, 0, 55, 26, 39, 36, 29, 0, 67, 0, 61, 44, 51, 42, 89, 0, 57, 52, 87, 0, 91, 0, 81, 74, 69, 0, 121, 50, 91, 68, 95, 0, 115, 66, 117, 76, 87, 0, 163, 0, 93, 100, 125, 78, 139, 0, 121, 92, 141, 0, 193, 0, 111, 120, 137, 88, 163, 0, 183, 118, 123, 0]

cp's OEIS Frontend

A325966 a(n) is the largest i <= sigma(n)-A020639(n) such that n-i and n-(sigma(n)-i) are relatively prime.

Table of values

List of values

n	a(n)
1	0
2	1
3	0
4	5
5	0
6	7
7	0
8	13
9	10
10	15
11	0
12	25
13	0
14	21
15	20
16	29
17	0
18	37
19	0
20	39
21	28
22	33
23	0
24	55
25	26
26	39
27	36
28	29
29	0
30	67
31	0
32	61
33	44
34	51
35	42
36	89
37	0
38	57
39	52
40	87
41	0
42	91
43	0
44	81
45	74
46	69
47	0
48	121
49	50
50	91
51	68
52	95
53	0
54	115
55	66
56	117
57	76
58	87
59	0
60	163
61	0
62	93
63	100
64	125
65	78
66	139
67	0
68	121
69	92
70	141
71	0
72	193
73	0
74	111
75	120
76	137
77	88
78	163
79	0
80	183
81	118
82	123
83	0

n	a(n)
1	0
2	1
3	0
4	5
5	0
6	7
7	0
8	13
9	10
10	15
11	0
12	25
13	0
14	21
15	20
16	29
17	0
18	37
19	0
20	39
21	28
22	33
23	0
24	55
25	26
26	39
27	36
28	29
29	0
30	67
31	0
32	61
33	44
34	51
35	42
36	89
37	0
38	57
39	52
40	87
41	0
42	91
43	0
44	81
45	74
46	69
47	0
48	121
49	50
50	91
51	68
52	95
53	0
54	115
55	66
56	117
57	76
58	87
59	0
60	163
61	0
62	93
63	100
64	125
65	78
66	139
67	0
68	121
69	92
70	141
71	0
72	193
73	0
74	111
75	120
76	137
77	88
78	163
79	0
80	183
81	118
82	123
83	0

n	a(n)
1	0
2	1
3	0
4	5
5	0
6	7
7	0
8	13
9	10
10	15
11	0
12	25
13	0
14	21
15	20
16	29
17	0
18	37
19	0
20	39
21	28
22	33
23	0
24	55
25	26
26	39
27	36
28	29
29	0
30	67
31	0
32	61
33	44
34	51
35	42
36	89
37	0
38	57
39	52
40	87
41	0
42	91
43	0
44	81
45	74
46	69
47	0
48	121
49	50
50	91
51	68
52	95
53	0
54	115
55	66
56	117
57	76
58	87
59	0
60	163
61	0
62	93
63	100
64	125
65	78
66	139
67	0
68	121
69	92
70	141
71	0
72	193
73	0
74	111
75	120
76	137
77	88
78	163
79	0
80	183
81	118
82	123
83	0