A167192 - cp's OEIS frontend

A167192 Triangle read by rows: T(n,k) = (n-k)/gcd(n,k), 1 <= k <= n.

n	a(n)
1	0
2	1
3	0
4	2
5	1
6	0
7	3
8	1
9	1
10	0
11	4
12	3
13	2
14	1
15	0
16	5
17	2
18	1
19	1
20	1
21	0
22	6
23	5
24	4
25	3
26	2
27	1
28	0
29	7
30	3
31	5
32	1
33	3
34	1
35	1
36	0
37	8
38	7
39	2
40	5
41	4
42	1
43	2
44	1
45	0
46	9
47	4
48	7
49	3
50	1
51	2
52	3
53	1
54	1
55	0
56	10
57	9
58	8
59	7
60	6
61	5
62	4
63	3
64	2
65	1
66	0
67	11
68	5
69	3
70	2
71	7
72	1
73	5
74	1
75	1
76	1
77	1
78	0
79	12
80	11
81	10
82	9
83	8
84	7
85	6
86	5
87	4
88	3
89	2
90	1
91	0
92	13
93	6
94	11
95	5
96	9
97	4
98	1
99	3
100	5
101	2
102	3

[0, 1, 0, 2, 1, 0, 3, 1, 1, 0, 4, 3, 2, 1, 0, 5, 2, 1, 1, 1, 0, 6, 5, 4, 3, 2, 1, 0, 7, 3, 5, 1, 3, 1, 1, 0, 8, 7, 2, 5, 4, 1, 2, 1, 0, 9, 4, 7, 3, 1, 2, 3, 1, 1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 11, 5, 3, 2, 7, 1, 5, 1, 1, 1, 1, 0, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, 13, 6, 11, 5, 9, 4, 1, 3, 5, 2, 3]

cp's OEIS Frontend

A167192 Triangle read by rows: T(n,k) = (n-k)/gcd(n,k), 1 <= k <= n.

Table of values

List of values

n	a(n)
1	0
2	1
3	0
4	2
5	1
6	0
7	3
8	1
9	1
10	0
11	4
12	3
13	2
14	1
15	0
16	5
17	2
18	1
19	1
20	1
21	0
22	6
23	5
24	4
25	3
26	2
27	1
28	0
29	7
30	3
31	5
32	1
33	3
34	1
35	1
36	0
37	8
38	7
39	2
40	5
41	4
42	1
43	2
44	1
45	0
46	9
47	4
48	7
49	3
50	1
51	2
52	3
53	1
54	1
55	0
56	10
57	9
58	8
59	7
60	6
61	5
62	4
63	3
64	2
65	1
66	0
67	11
68	5
69	3
70	2
71	7
72	1
73	5
74	1
75	1
76	1
77	1
78	0
79	12
80	11
81	10
82	9
83	8
84	7
85	6
86	5
87	4
88	3
89	2
90	1
91	0
92	13
93	6
94	11
95	5
96	9
97	4
98	1
99	3
100	5
101	2
102	3

n	a(n)
1	0
2	1
3	0
4	2
5	1
6	0
7	3
8	1
9	1
10	0
11	4
12	3
13	2
14	1
15	0
16	5
17	2
18	1
19	1
20	1
21	0
22	6
23	5
24	4
25	3
26	2
27	1
28	0
29	7
30	3
31	5
32	1
33	3
34	1
35	1
36	0
37	8
38	7
39	2
40	5
41	4
42	1
43	2
44	1
45	0
46	9
47	4
48	7
49	3
50	1
51	2
52	3
53	1
54	1
55	0
56	10
57	9
58	8
59	7
60	6
61	5
62	4
63	3
64	2
65	1
66	0
67	11
68	5
69	3
70	2
71	7
72	1
73	5
74	1
75	1
76	1
77	1
78	0
79	12
80	11
81	10
82	9
83	8
84	7
85	6
86	5
87	4
88	3
89	2
90	1
91	0
92	13
93	6
94	11
95	5
96	9
97	4
98	1
99	3
100	5
101	2
102	3

n	a(n)
1	0
2	1
3	0
4	2
5	1
6	0
7	3
8	1
9	1
10	0
11	4
12	3
13	2
14	1
15	0
16	5
17	2
18	1
19	1
20	1
21	0
22	6
23	5
24	4
25	3
26	2
27	1
28	0
29	7
30	3
31	5
32	1
33	3
34	1
35	1
36	0
37	8
38	7
39	2
40	5
41	4
42	1
43	2
44	1
45	0
46	9
47	4
48	7
49	3
50	1
51	2
52	3
53	1
54	1
55	0
56	10
57	9
58	8
59	7
60	6
61	5
62	4
63	3
64	2
65	1
66	0
67	11
68	5
69	3
70	2
71	7
72	1
73	5
74	1
75	1
76	1
77	1
78	0
79	12
80	11
81	10
82	9
83	8
84	7
85	6
86	5
87	4
88	3
89	2
90	1
91	0
92	13
93	6
94	11
95	5
96	9
97	4
98	1
99	3
100	5
101	2
102	3