A306488 - cp's OEIS frontend

A306488 Number of ways of expressing n as a + b + c, with a, b, and c positive integers, gcd(a, b) = 1, but gcd(a, c) and gcd(b, c) both greater than 1.

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	0
13	1
14	0
15	0
16	0
17	4
18	0
19	4
20	0
21	1
22	0
23	9
24	0
25	7
26	1
27	4
28	1
29	15
30	0
31	13
32	1
33	4
34	2
35	16
36	0
37	24
38	4
39	10
40	1
41	29
42	0
43	32
44	4
45	5
46	3
47	41
48	0
49	38
50	2
51	17
52	6
53	54
54	1
55	43
56	6
57	26
58	10
59	70
60	0
61	65
62	9
63	20
64	11
65	68
66	1
67	86
68	14
69	35
70	2
71	99
72	1
73	99
74	15
75	18
76	16
77	104
78	1
79	125
80	10
81	53
82	19
83	134
84	0
85	114
86	21
87	58

[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 4, 0, 4, 0, 1, 0, 9, 0, 7, 1, 4, 1, 15, 0, 13, 1, 4, 2, 16, 0, 24, 4, 10, 1, 29, 0, 32, 4, 5, 3, 41, 0, 38, 2, 17, 6, 54, 1, 43, 6, 26, 10, 70, 0, 65, 9, 20, 11, 68, 1, 86, 14, 35, 2, 99, 1, 99, 15, 18, 16, 104, 1, 125, 10, 53, 19, 134, 0, 114, 21, 58]

cp's OEIS Frontend

A306488 Number of ways of expressing n as a + b + c, with a, b, and c positive integers, gcd(a, b) = 1, but gcd(a, c) and gcd(b, c) both greater than 1.

Table of values

List of values

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	0
13	1
14	0
15	0
16	0
17	4
18	0
19	4
20	0
21	1
22	0
23	9
24	0
25	7
26	1
27	4
28	1
29	15
30	0
31	13
32	1
33	4
34	2
35	16
36	0
37	24
38	4
39	10
40	1
41	29
42	0
43	32
44	4
45	5
46	3
47	41
48	0
49	38
50	2
51	17
52	6
53	54
54	1
55	43
56	6
57	26
58	10
59	70
60	0
61	65
62	9
63	20
64	11
65	68
66	1
67	86
68	14
69	35
70	2
71	99
72	1
73	99
74	15
75	18
76	16
77	104
78	1
79	125
80	10
81	53
82	19
83	134
84	0
85	114
86	21
87	58

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	0
13	1
14	0
15	0
16	0
17	4
18	0
19	4
20	0
21	1
22	0
23	9
24	0
25	7
26	1
27	4
28	1
29	15
30	0
31	13
32	1
33	4
34	2
35	16
36	0
37	24
38	4
39	10
40	1
41	29
42	0
43	32
44	4
45	5
46	3
47	41
48	0
49	38
50	2
51	17
52	6
53	54
54	1
55	43
56	6
57	26
58	10
59	70
60	0
61	65
62	9
63	20
64	11
65	68
66	1
67	86
68	14
69	35
70	2
71	99
72	1
73	99
74	15
75	18
76	16
77	104
78	1
79	125
80	10
81	53
82	19
83	134
84	0
85	114
86	21
87	58

n	a(n)
0	0
1	0
2	0
3	0
4	0
5	0
6	0
7	0
8	0
9	0
10	0
11	1
12	0
13	1
14	0
15	0
16	0
17	4
18	0
19	4
20	0
21	1
22	0
23	9
24	0
25	7
26	1
27	4
28	1
29	15
30	0
31	13
32	1
33	4
34	2
35	16
36	0
37	24
38	4
39	10
40	1
41	29
42	0
43	32
44	4
45	5
46	3
47	41
48	0
49	38
50	2
51	17
52	6
53	54
54	1
55	43
56	6
57	26
58	10
59	70
60	0
61	65
62	9
63	20
64	11
65	68
66	1
67	86
68	14
69	35
70	2
71	99
72	1
73	99
74	15
75	18
76	16
77	104
78	1
79	125
80	10
81	53
82	19
83	134
84	0
85	114
86	21
87	58