A060018 - cp's OEIS frontend

A060018 a(n) = floor(2*sqrt(n-2)).

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

[0, 2, 2, 3, 4, 4, 4, 5, 5, 6, 6, 6, 6, 7, 7, 7, 8, 8, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16]

cp's OEIS Frontend

A060018 a(n) = floor(2*sqrt(n-2)).

Table of values

List of values

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

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

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