A103128 - cp's OEIS frontend

A103128 a(n) = floor(sqrt(2n-1)).

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

[1, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 5, 5, 6, 6, 6, 6, 6, 6, 7, 7, 7, 7, 7, 7, 7, 7, 8, 8, 8, 8, 8, 8, 8, 8, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12]

cp's OEIS Frontend

A103128 a(n) = floor(sqrt(2n-1)).

Table of values

List of values

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

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

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