A131504 - cp's OEIS frontend

A131504 Array read by antidiagonals: a(m,n) = m-th integer from among those positive integers that are coprime to (m*n).

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

[1, 1, 3, 1, 3, 4, 1, 5, 7, 7, 1, 3, 4, 7, 6, 1, 3, 7, 11, 11, 17, 1, 5, 4, 7, 8, 17, 8, 1, 3, 7, 9, 11, 17, 15, 15, 1, 3, 4, 11, 6, 17, 11, 15, 13, 1, 5, 7, 9, 17, 19, 15, 23, 25, 23, 1, 3, 4, 7, 6, 17, 9, 15, 13, 23, 12, 1, 3, 11, 11, 11, 19, 23, 19, 25, 37, 23, 35, 1, 5, 4, 9, 8, 17, 8, 23, 16]

cp's OEIS Frontend

A131504 Array read by antidiagonals: a(m,n) = m-th integer from among those positive integers that are coprime to (m*n).

Table of values

List of values

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

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

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