A289251 - cp's OEIS frontend

A289251 Triangle T(n, k), n > 0 and 0 <= k < n, read by rows; if gcd(n, k) = 1, then T(n, k) = modular inverse of k (mod n), otherwise T(n, k) = k.

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

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

cp's OEIS Frontend

A289251 Triangle T(n, k), n > 0 and 0 <= k < n, read by rows; if gcd(n, k) = 1, then T(n, k) = modular inverse of k (mod n), otherwise T(n, k) = k.

Table of values

List of values

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

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

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