A373355 - cp's OEIS frontend

A373355 Triangle read by rows: T(n, k) = [n - k + 1 || k] where [n || k] is defined below. Ways in which two primes can relate to each other modulo quadratic residue.

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

[1, 2, 3, 2, 1, 3, 1, 0, 0, 1, 2, 2, 1, 3, 3, 2, 3, 0, 0, 2, 3, 1, 1, 1, 1, 1, 1, 1, 2, 0, 0, 2, 3, 0, 0, 3, 1, 2, 0, 0, 1, 0, 0, 3, 1, 2, 3, 1, 0, 0, 0, 0, 1, 2, 3, 1, 0, 0, 3, 0, 1, 0, 2, 0, 0, 1, 2, 2, 1, 2, 3, 1, 1, 2, 3, 1, 3, 3, 1, 1, 1, 1, 2, 0, 1, 0, 3, 1, 1, 1, 1]

cp's OEIS Frontend

A373355 Triangle read by rows: T(n, k) = [n - k + 1 || k] where [n || k] is defined below. Ways in which two primes can relate to each other modulo quadratic residue.

Table of values

List of values

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

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

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