A325961 - cp's OEIS frontend

A325961 a(n) is the least k >= A061228(n)-1 such that n-k and n-(sigma(n)-k) are relatively prime, or 0 if no such k <= sigma(n) exists.

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

[1, 3, 0, 5, 0, 7, 0, 9, 11, 11, 0, 13, 0, 15, 20, 17, 0, 19, 0, 21, 24, 23, 0, 25, 29, 27, 30, 29, 0, 31, 0, 33, 38, 35, 40, 37, 0, 39, 42, 41, 0, 43, 0, 45, 50, 47, 0, 49, 55, 51, 58, 53, 0, 55, 60, 57, 60, 59, 0, 61, 0, 63, 66, 65, 70, 67, 0, 69, 74, 71, 0, 73, 0, 75, 78, 77, 84, 79, 0, 81, 83, 83, 0, 85, 90, 87, 92, 89, 0, 91, 100]

cp's OEIS Frontend

A325961 a(n) is the least k >= A061228(n)-1 such that n-k and n-(sigma(n)-k) are relatively prime, or 0 if no such k <= sigma(n) exists.

Table of values

List of values

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

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

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