A355474 - cp's OEIS frontend

A355474 Square array T(m,n) = Card({ (i, j) : 1 <= i <= m, 1 <= j <= min(n, i), GCD(i, j) = 1 }), read by antidiagonals upwards.

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

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

cp's OEIS Frontend

A355474 Square array T(m,n) = Card({ (i, j) : 1 <= i <= m, 1 <= j <= min(n, i), GCD(i, j) = 1 }), read by antidiagonals upwards.

Table of values

List of values

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

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

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