A216319 - cp's OEIS frontend

A216319 Irregular triangle: row n lists the odd numbers of the reduced residue system modulo n.

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

[1, 1, 1, 1, 3, 1, 3, 1, 5, 1, 3, 5, 1, 3, 5, 7, 1, 5, 7, 1, 3, 7, 9, 1, 3, 5, 7, 9, 1, 5, 7, 11, 1, 3, 5, 7, 9, 11, 1, 3, 5, 9, 11, 13, 1, 7, 11, 13, 1, 3, 5, 7, 9, 11, 13, 15, 1, 3, 5, 7, 9, 11, 13, 15, 1, 5, 7, 11, 13, 17, 1, 3, 5, 7, 9, 11, 13, 15, 17, 1, 3, 7, 9, 11, 13, 17, 19]

cp's OEIS Frontend

A216319 Irregular triangle: row n lists the odd numbers of the reduced residue system modulo n.

Table of values

List of values

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

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

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