A219695 - cp's OEIS frontend

A219695 For odd numbers 2n - 1, half the difference between the largest divisor not exceeding the square root, and the least divisor not less than the square root.

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

[0, 1, 2, 3, 0, 5, 6, 1, 8, 9, 2, 11, 0, 3, 14, 15, 4, 1, 18, 5, 20, 21, 2, 23, 0, 7, 26, 3, 8, 29, 30, 1, 4, 33, 10, 35, 36, 5, 2, 39, 0, 41, 6, 13, 44, 3, 14, 7, 48, 1, 50, 51, 4, 53, 54, 17, 56, 9, 2, 5, 0, 19, 10, 63, 20, 65, 6, 3, 68, 69, 22, 1, 12, 7, 74, 75, 4, 13, 78, 25, 8, 81, 2, 83, 0, 5, 86, 9, 28, 89]

cp's OEIS Frontend

A219695 For odd numbers 2n - 1, half the difference between the largest divisor not exceeding the square root, and the least divisor not less than the square root.

Table of values

List of values

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

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

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