A127731 - cp's OEIS frontend

A127731 Triangle read by rows, where row n consists of the r's where r = (nm)/(n+m) and the m's are positive integers such that (n+m) divides (nm).

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

[1, 2, 2, 3, 4, 2, 3, 4, 5, 6, 4, 6, 7, 6, 8, 5, 6, 8, 9, 10, 3, 4, 6, 8, 9, 10, 11, 12, 7, 10, 12, 13, 6, 10, 12, 14, 8, 12, 14, 15, 16, 6, 9, 12, 14, 15, 16, 17, 18, 4, 10, 12, 15, 16, 18, 19, 12, 14, 18, 20, 11, 18, 20, 21, 22, 6, 8, 12, 15, 16, 18, 20, 21, 22, 23, 20, 24, 13, 22, 24, 25]

cp's OEIS Frontend

A127731 Triangle read by rows, where row n consists of the r's where r = (nm)/(n+m) and the m's are positive integers such that (n+m) divides (nm).

Table of values

List of values

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

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

cp's OEIS Frontend

A127731 Triangle read by rows, where row n consists of the r's where r = (n*m)/(n+m) and the m's are positive integers such that (n+m) divides (n*m).

Table of values

List of values

A127731 Triangle read by rows, where row n consists of the r's where r = (nm)/(n+m) and the m's are positive integers such that (n+m) divides (nm).

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