A331047 - cp's OEIS frontend

A331047 T(n,k) = -(-1)^k*ceiling(k/2)^2 mod p, where p is the n-th prime congruent to 2 or 3 mod 4; triangle T(n,k), n>=1, 0<=k<=p-1, read by rows.

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

[0, 1, 0, 1, 2, 0, 1, 6, 4, 3, 2, 5, 0, 1, 10, 4, 7, 9, 2, 5, 6, 3, 8, 0, 1, 18, 4, 15, 9, 10, 16, 3, 6, 13, 17, 2, 11, 8, 7, 12, 5, 14, 0, 1, 22, 4, 19, 9, 14, 16, 7, 2, 21, 13, 10, 3, 20, 18, 5, 12, 11, 8, 15, 6, 17, 0, 1, 30, 4, 27, 9, 22, 16, 15, 25, 6, 5]

cp's OEIS Frontend

A331047 T(n,k) = -(-1)^k*ceiling(k/2)^2 mod p, where p is the n-th prime congruent to 2 or 3 mod 4; triangle T(n,k), n>=1, 0<=k<=p-1, read by rows.

Table of values

List of values

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

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

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