A381884 - cp's OEIS frontend

A381884 Triangle read by rows: T(n, k) = 0 if n = 0 or k is not a quadratic residue modulo n, otherwise T(n, k) = k.

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

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

cp's OEIS Frontend

A381884 Triangle read by rows: T(n, k) = 0 if n = 0 or k is not a quadratic residue modulo n, otherwise T(n, k) = k.

Table of values

List of values

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

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

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