A332435 - cp's OEIS frontend

A332435 Row sums of the irregular triangle A332434. a(n) equals the number of odd numbers <= n, of the smallest nonnegative reduced residue system modulo (2*n + 1), for n >= 1.

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

[1, 1, 2, 1, 3, 3, 2, 4, 5, 2, 6, 5, 5, 7, 8, 4, 6, 9, 6, 10, 11, 6, 12, 10, 8, 13, 10, 8, 15, 15, 10, 12, 17, 10, 18, 18, 10, 14, 20, 13, 21, 16, 14, 22, 18, 14, 18, 24, 16, 25, 26, 12, 27, 27, 18, 28, 22, 18, 24, 27, 20, 25, 32, 20, 33, 26, 18, 34, 35, 22, 30, 28, 22, 37, 38, 24, 30, 39, 26, 32, 41, 20]

cp's OEIS Frontend

A332435 Row sums of the irregular triangle A332434. a(n) equals the number of odd numbers <= n, of the smallest nonnegative reduced residue system modulo (2*n + 1), for n >= 1.

Table of values

List of values

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

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

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