A293137 - cp's OEIS frontend

A293137 a(0) = 0, and a(n) = floor(2*sqrt(n)) - 1 for n >= 1.

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	3
6	3
7	4
8	4
9	5
10	5
11	5
12	5
13	6
14	6
15	6
16	7
17	7
18	7
19	7
20	7
21	8
22	8
23	8
24	8
25	9
26	9
27	9
28	9
29	9
30	9
31	10
32	10
33	10
34	10
35	10
36	11
37	11
38	11
39	11
40	11
41	11
42	11
43	12
44	12
45	12
46	12
47	12
48	12
49	13
50	13
51	13
52	13
53	13
54	13
55	13
56	13
57	14
58	14
59	14
60	14
61	14
62	14
63	14
64	15
65	15
66	15
67	15
68	15
69	15
70	15
71	15
72	15
73	16
74	16
75	16
76	16
77	16
78	16
79	16
80	16
81	17
82	17
83	17
84	17
85	17
86	17
87	17
88	17
89	17
90	17
91	18

[0, 1, 1, 2, 3, 3, 3, 4, 4, 5, 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 13, 13, 13, 13, 13, 13, 13, 13, 14, 14, 14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 15, 15, 15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 18]

cp's OEIS Frontend

A293137 a(0) = 0, and a(n) = floor(2*sqrt(n)) - 1 for n >= 1.

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	3
6	3
7	4
8	4
9	5
10	5
11	5
12	5
13	6
14	6
15	6
16	7
17	7
18	7
19	7
20	7
21	8
22	8
23	8
24	8
25	9
26	9
27	9
28	9
29	9
30	9
31	10
32	10
33	10
34	10
35	10
36	11
37	11
38	11
39	11
40	11
41	11
42	11
43	12
44	12
45	12
46	12
47	12
48	12
49	13
50	13
51	13
52	13
53	13
54	13
55	13
56	13
57	14
58	14
59	14
60	14
61	14
62	14
63	14
64	15
65	15
66	15
67	15
68	15
69	15
70	15
71	15
72	15
73	16
74	16
75	16
76	16
77	16
78	16
79	16
80	16
81	17
82	17
83	17
84	17
85	17
86	17
87	17
88	17
89	17
90	17
91	18

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	3
6	3
7	4
8	4
9	5
10	5
11	5
12	5
13	6
14	6
15	6
16	7
17	7
18	7
19	7
20	7
21	8
22	8
23	8
24	8
25	9
26	9
27	9
28	9
29	9
30	9
31	10
32	10
33	10
34	10
35	10
36	11
37	11
38	11
39	11
40	11
41	11
42	11
43	12
44	12
45	12
46	12
47	12
48	12
49	13
50	13
51	13
52	13
53	13
54	13
55	13
56	13
57	14
58	14
59	14
60	14
61	14
62	14
63	14
64	15
65	15
66	15
67	15
68	15
69	15
70	15
71	15
72	15
73	16
74	16
75	16
76	16
77	16
78	16
79	16
80	16
81	17
82	17
83	17
84	17
85	17
86	17
87	17
88	17
89	17
90	17
91	18

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	3
6	3
7	4
8	4
9	5
10	5
11	5
12	5
13	6
14	6
15	6
16	7
17	7
18	7
19	7
20	7
21	8
22	8
23	8
24	8
25	9
26	9
27	9
28	9
29	9
30	9
31	10
32	10
33	10
34	10
35	10
36	11
37	11
38	11
39	11
40	11
41	11
42	11
43	12
44	12
45	12
46	12
47	12
48	12
49	13
50	13
51	13
52	13
53	13
54	13
55	13
56	13
57	14
58	14
59	14
60	14
61	14
62	14
63	14
64	15
65	15
66	15
67	15
68	15
69	15
70	15
71	15
72	15
73	16
74	16
75	16
76	16
77	16
78	16
79	16
80	16
81	17
82	17
83	17
84	17
85	17
86	17
87	17
88	17
89	17
90	17
91	18