A121854 - cp's OEIS frontend

A121854 a(n) = floor(Pi*(sqrt(n))).

n	a(n)
0	0
1	3
2	4
3	5
4	6
5	7
6	7
7	8
8	8
9	9
10	9
11	10
12	10
13	11
14	11
15	12
16	12
17	12
18	13
19	13
20	14
21	14
22	14
23	15
24	15
25	15
26	16
27	16
28	16
29	16
30	17
31	17
32	17
33	18
34	18
35	18
36	18
37	19
38	19
39	19
40	19
41	20
42	20
43	20
44	20
45	21
46	21
47	21
48	21
49	21
50	22
51	22
52	22
53	22
54	23
55	23
56	23
57	23
58	23
59	24
60	24
61	24

[0, 3, 4, 5, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 12, 13, 13, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 21, 22, 22, 22, 22, 23, 23, 23, 23, 23, 24, 24, 24]

cp's OEIS Frontend

A121854 a(n) = floor(Pi*(sqrt(n))).

Table of values

List of values

n	a(n)
0	0
1	3
2	4
3	5
4	6
5	7
6	7
7	8
8	8
9	9
10	9
11	10
12	10
13	11
14	11
15	12
16	12
17	12
18	13
19	13
20	14
21	14
22	14
23	15
24	15
25	15
26	16
27	16
28	16
29	16
30	17
31	17
32	17
33	18
34	18
35	18
36	18
37	19
38	19
39	19
40	19
41	20
42	20
43	20
44	20
45	21
46	21
47	21
48	21
49	21
50	22
51	22
52	22
53	22
54	23
55	23
56	23
57	23
58	23
59	24
60	24
61	24

n	a(n)
0	0
1	3
2	4
3	5
4	6
5	7
6	7
7	8
8	8
9	9
10	9
11	10
12	10
13	11
14	11
15	12
16	12
17	12
18	13
19	13
20	14
21	14
22	14
23	15
24	15
25	15
26	16
27	16
28	16
29	16
30	17
31	17
32	17
33	18
34	18
35	18
36	18
37	19
38	19
39	19
40	19
41	20
42	20
43	20
44	20
45	21
46	21
47	21
48	21
49	21
50	22
51	22
52	22
53	22
54	23
55	23
56	23
57	23
58	23
59	24
60	24
61	24

n	a(n)
0	0
1	3
2	4
3	5
4	6
5	7
6	7
7	8
8	8
9	9
10	9
11	10
12	10
13	11
14	11
15	12
16	12
17	12
18	13
19	13
20	14
21	14
22	14
23	15
24	15
25	15
26	16
27	16
28	16
29	16
30	17
31	17
32	17
33	18
34	18
35	18
36	18
37	19
38	19
39	19
40	19
41	20
42	20
43	20
44	20
45	21
46	21
47	21
48	21
49	21
50	22
51	22
52	22
53	22
54	23
55	23
56	23
57	23
58	23
59	24
60	24
61	24