A076874 - cp's OEIS frontend

A076874 a(n) = n - floor ( ( 4*n + 1 )^(1/2) ).

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

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

cp's OEIS Frontend

A076874 a(n) = n - floor ( ( 4*n + 1 )^(1/2) ).

Table of values

List of values

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

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

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