A242396 - cp's OEIS frontend

A242396 Number of rows of equilateral triangles (sides length = 1) that intersect the circumference of a circle of radius n centered at (0,0) or (1/2,0).

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	14
7	18
8	20
9	22
10	24
11	26
12	28
13	32
14	34
15	36
16	38
17	40
18	42
19	44
20	48
21	50
22	52
23	54
24	56
25	58
26	62
27	64
28	66
29	68
30	70
31	72
32	74
33	78
34	80
35	82
36	84
37	86
38	88
39	92
40	94
41	96
42	98
43	100
44	102
45	104
46	108
47	110
48	112
49	114
50	116
51	118
52	122
53	124
54	126
55	128
56	130
57	132
58	134
59	138
60	140
61	142

[4, 6, 8, 10, 12, 14, 18, 20, 22, 24, 26, 28, 32, 34, 36, 38, 40, 42, 44, 48, 50, 52, 54, 56, 58, 62, 64, 66, 68, 70, 72, 74, 78, 80, 82, 84, 86, 88, 92, 94, 96, 98, 100, 102, 104, 108, 110, 112, 114, 116, 118, 122, 124, 126, 128, 130, 132, 134, 138, 140, 142]

cp's OEIS Frontend

A242396 Number of rows of equilateral triangles (sides length = 1) that intersect the circumference of a circle of radius n centered at (0,0) or (1/2,0).

Table of values

List of values

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	14
7	18
8	20
9	22
10	24
11	26
12	28
13	32
14	34
15	36
16	38
17	40
18	42
19	44
20	48
21	50
22	52
23	54
24	56
25	58
26	62
27	64
28	66
29	68
30	70
31	72
32	74
33	78
34	80
35	82
36	84
37	86
38	88
39	92
40	94
41	96
42	98
43	100
44	102
45	104
46	108
47	110
48	112
49	114
50	116
51	118
52	122
53	124
54	126
55	128
56	130
57	132
58	134
59	138
60	140
61	142

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	14
7	18
8	20
9	22
10	24
11	26
12	28
13	32
14	34
15	36
16	38
17	40
18	42
19	44
20	48
21	50
22	52
23	54
24	56
25	58
26	62
27	64
28	66
29	68
30	70
31	72
32	74
33	78
34	80
35	82
36	84
37	86
38	88
39	92
40	94
41	96
42	98
43	100
44	102
45	104
46	108
47	110
48	112
49	114
50	116
51	118
52	122
53	124
54	126
55	128
56	130
57	132
58	134
59	138
60	140
61	142

n	a(n)
1	4
2	6
3	8
4	10
5	12
6	14
7	18
8	20
9	22
10	24
11	26
12	28
13	32
14	34
15	36
16	38
17	40
18	42
19	44
20	48
21	50
22	52
23	54
24	56
25	58
26	62
27	64
28	66
29	68
30	70
31	72
32	74
33	78
34	80
35	82
36	84
37	86
38	88
39	92
40	94
41	96
42	98
43	100
44	102
45	104
46	108
47	110
48	112
49	114
50	116
51	118
52	122
53	124
54	126
55	128
56	130
57	132
58	134
59	138
60	140
61	142