A384717 - cp's OEIS frontend

A384717 Sum of floored squared chord lengths from -1 to the 2n-th roots of unity (upper semicircle, endpoints excluded).

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

[0, 2, 4, 5, 6, 9, 9, 11, 13, 14, 15, 18, 18, 20, 22, 23, 24, 27, 27, 29, 31, 32, 33, 36, 36, 38, 40, 41, 42, 45, 45, 47, 49, 50, 51, 54, 54, 56, 58, 59, 60, 63, 63, 65, 67, 68, 69, 72, 72, 74, 76, 77, 78, 81, 81, 83, 85, 86, 87, 90]

cp's OEIS Frontend

A384717 Sum of floored squared chord lengths from -1 to the 2n-th roots of unity (upper semicircle, endpoints excluded).

Table of values

List of values

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

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

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