A257522 - cp's OEIS frontend

A257522 Table T(i,j) = denominator of (1/i + 1/j) = ij/gcd(ij,i+j) read by antidiagonals (i >= 1, j >= 1).

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

[1, 2, 2, 3, 1, 3, 4, 6, 6, 4, 5, 4, 3, 4, 5, 6, 10, 12, 12, 10, 6, 7, 3, 15, 2, 15, 3, 7, 8, 14, 2, 20, 20, 2, 14, 8, 9, 8, 21, 12, 5, 12, 21, 8, 9, 10, 18, 24, 28, 30, 30, 28, 24, 18, 10, 11, 5, 9, 8, 35, 3, 35, 8, 9, 5, 11, 12, 22, 30, 36, 40, 42, 42, 40, 36, 30, 22, 12]

cp's OEIS Frontend

A257522 Table T(i,j) = denominator of (1/i + 1/j) = ij/gcd(ij,i+j) read by antidiagonals (i >= 1, j >= 1).

Table of values

List of values

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

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

cp's OEIS Frontend

A257522 Table T(i,j) = denominator of (1/i + 1/j) = i*j/gcd(i*j,i+j) read by antidiagonals (i >= 1, j >= 1).

Table of values

List of values

A257522 Table T(i,j) = denominator of (1/i + 1/j) = ij/gcd(ij,i+j) read by antidiagonals (i >= 1, j >= 1).

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