A345128 - cp's OEIS frontend

A345128 Number of squarefree products s*t from all positive integer pairs (s,t), such that s + t = n, s <= t.

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

[0, 1, 1, 1, 1, 1, 2, 2, 1, 1, 2, 2, 3, 2, 2, 3, 4, 3, 3, 3, 2, 4, 4, 4, 4, 4, 4, 3, 5, 4, 5, 5, 4, 6, 4, 5, 7, 6, 5, 6, 8, 5, 9, 7, 6, 7, 8, 7, 8, 7, 5, 8, 10, 7, 6, 8, 7, 10, 9, 7, 11, 10, 8, 10, 8, 8, 11, 10, 9, 10, 11, 10, 13, 13, 9, 12, 10, 10, 14, 12, 12, 12, 13, 11, 12]

cp's OEIS Frontend

A345128 Number of squarefree products s*t from all positive integer pairs (s,t), such that s + t = n, s <= t.

Table of values

List of values

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

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

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