A373749 - cp's OEIS frontend

A373749 Triangle read by rows: T(n, k) = MOD(k^2, n) where MOD(a, n) = a if n = 0 and otherwise a - n*floor(a/n). (Quadratic residue.)

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

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

cp's OEIS Frontend

A373749 Triangle read by rows: T(n, k) = MOD(k^2, n) where MOD(a, n) = a if n = 0 and otherwise a - n*floor(a/n). (Quadratic residue.)

Table of values

List of values

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

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

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