A165974 - cp's OEIS frontend

A165974 Irregular triangle read by rows: floor(j^2 / p) for p prime and j = 1 to p-1.

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

[0, 0, 1, 0, 0, 1, 3, 0, 0, 1, 2, 3, 5, 0, 0, 0, 1, 2, 3, 4, 5, 7, 9, 0, 0, 0, 1, 1, 2, 3, 4, 6, 7, 9, 11, 0, 0, 0, 0, 1, 2, 2, 3, 4, 5, 7, 8, 9, 11, 13, 15, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 13, 15, 17, 0, 0, 0, 0, 1, 1, 2, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 14, 15, 17, 19, 21]

cp's OEIS Frontend

A165974 Irregular triangle read by rows: floor(j^2 / p) for p prime and j = 1 to p-1.

Table of values

List of values

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

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

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