A077581 - cp's OEIS frontend

A077581 Triangle in which row n contains the n smallest numbers starting from 1 and coprime to n.

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	4
7	1
8	3
9	5
10	7
11	1
12	2
13	3
14	4
15	6
16	1
17	5
18	7
19	11
20	13
21	17
22	1
23	2
24	3
25	4
26	5
27	6
28	8
29	1
30	3
31	5
32	7
33	9
34	11
35	13
36	15
37	1
38	2
39	4
40	5
41	7
42	8
43	10
44	11
45	13
46	1
47	3
48	7
49	9
50	11
51	13
52	17
53	19
54	21
55	23
56	1
57	2
58	3
59	4
60	5
61	6
62	7
63	8
64	9
65	10
66	12
67	1
68	5
69	7
70	11
71	13
72	17
73	19
74	23
75	25
76	29
77	31
78	35
79	1
80	2
81	3
82	4
83	5
84	6
85	7
86	8
87	9
88	10
89	11
90	12

[1, 1, 3, 1, 2, 4, 1, 3, 5, 7, 1, 2, 3, 4, 6, 1, 5, 7, 11, 13, 17, 1, 2, 3, 4, 5, 6, 8, 1, 3, 5, 7, 9, 11, 13, 15, 1, 2, 4, 5, 7, 8, 10, 11, 13, 1, 3, 7, 9, 11, 13, 17, 19, 21, 23, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 1, 5, 7, 11, 13, 17, 19, 23, 25, 29, 31, 35, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]

cp's OEIS Frontend

A077581 Triangle in which row n contains the n smallest numbers starting from 1 and coprime to n.

Table of values

List of values

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	4
7	1
8	3
9	5
10	7
11	1
12	2
13	3
14	4
15	6
16	1
17	5
18	7
19	11
20	13
21	17
22	1
23	2
24	3
25	4
26	5
27	6
28	8
29	1
30	3
31	5
32	7
33	9
34	11
35	13
36	15
37	1
38	2
39	4
40	5
41	7
42	8
43	10
44	11
45	13
46	1
47	3
48	7
49	9
50	11
51	13
52	17
53	19
54	21
55	23
56	1
57	2
58	3
59	4
60	5
61	6
62	7
63	8
64	9
65	10
66	12
67	1
68	5
69	7
70	11
71	13
72	17
73	19
74	23
75	25
76	29
77	31
78	35
79	1
80	2
81	3
82	4
83	5
84	6
85	7
86	8
87	9
88	10
89	11
90	12

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	4
7	1
8	3
9	5
10	7
11	1
12	2
13	3
14	4
15	6
16	1
17	5
18	7
19	11
20	13
21	17
22	1
23	2
24	3
25	4
26	5
27	6
28	8
29	1
30	3
31	5
32	7
33	9
34	11
35	13
36	15
37	1
38	2
39	4
40	5
41	7
42	8
43	10
44	11
45	13
46	1
47	3
48	7
49	9
50	11
51	13
52	17
53	19
54	21
55	23
56	1
57	2
58	3
59	4
60	5
61	6
62	7
63	8
64	9
65	10
66	12
67	1
68	5
69	7
70	11
71	13
72	17
73	19
74	23
75	25
76	29
77	31
78	35
79	1
80	2
81	3
82	4
83	5
84	6
85	7
86	8
87	9
88	10
89	11
90	12

n	a(n)
1	1
2	1
3	3
4	1
5	2
6	4
7	1
8	3
9	5
10	7
11	1
12	2
13	3
14	4
15	6
16	1
17	5
18	7
19	11
20	13
21	17
22	1
23	2
24	3
25	4
26	5
27	6
28	8
29	1
30	3
31	5
32	7
33	9
34	11
35	13
36	15
37	1
38	2
39	4
40	5
41	7
42	8
43	10
44	11
45	13
46	1
47	3
48	7
49	9
50	11
51	13
52	17
53	19
54	21
55	23
56	1
57	2
58	3
59	4
60	5
61	6
62	7
63	8
64	9
65	10
66	12
67	1
68	5
69	7
70	11
71	13
72	17
73	19
74	23
75	25
76	29
77	31
78	35
79	1
80	2
81	3
82	4
83	5
84	6
85	7
86	8
87	9
88	10
89	11
90	12