A300288 - cp's OEIS frontend

A300288 Irregular triangle read by rows: row n lists the numbers k such that -n <= k <= n and gcd(k, 2*n+1) != 1.

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

[0, 0, 0, -3, 0, 3, 0, 0, -6, -5, -3, 0, 3, 5, 6, 0, 0, -9, -7, -6, -3, 0, 3, 6, 7, 9, 0, -10, -5, 0, 5, 10, -12, -9, -6, -3, 0, 3, 6, 9, 12, 0, 0, -15, -12, -11, -9, -6, -3, 0, 3, 6, 9, 11, 12, 15, -15, -14, -10, -7, -5, 0, 5, 7, 10, 14, 15, 0, -18, -15, -13, -12, -9, -6, -3, 0, 3, 6, 9, 12, 13, 15, 18, 0]

cp's OEIS Frontend

A300288 Irregular triangle read by rows: row n lists the numbers k such that -n <= k <= n and gcd(k, 2*n+1) != 1.

Table of values

List of values

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

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

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