A152771 - cp's OEIS frontend

A152771 a(n) = sigma(n) - 2*d(n) + 1.

n	a(n)
1	0
2	0
3	1
4	2
5	3
6	5
7	5
8	8
9	8
10	11
11	9
12	17
13	11
14	17
15	17
16	22
17	15
18	28
19	17
20	31
21	25
22	29
23	21
24	45
25	26
26	35
27	33
28	45
29	27
30	57
31	29
32	52
33	41
34	47
35	41
36	74
37	35
38	53
39	49
40	75
41	39
42	81
43	41
44	73
45	67
46	65
47	45
48	105
49	52
50	82
51	65
52	87
53	51
54	105
55	65
56	105
57	73
58	83
59	57
60	145

[0, 0, 1, 2, 3, 5, 5, 8, 8, 11, 9, 17, 11, 17, 17, 22, 15, 28, 17, 31, 25, 29, 21, 45, 26, 35, 33, 45, 27, 57, 29, 52, 41, 47, 41, 74, 35, 53, 49, 75, 39, 81, 41, 73, 67, 65, 45, 105, 52, 82, 65, 87, 51, 105, 65, 105, 73, 83, 57, 145]

cp's OEIS Frontend

A152771 a(n) = sigma(n) - 2*d(n) + 1.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	2
5	3
6	5
7	5
8	8
9	8
10	11
11	9
12	17
13	11
14	17
15	17
16	22
17	15
18	28
19	17
20	31
21	25
22	29
23	21
24	45
25	26
26	35
27	33
28	45
29	27
30	57
31	29
32	52
33	41
34	47
35	41
36	74
37	35
38	53
39	49
40	75
41	39
42	81
43	41
44	73
45	67
46	65
47	45
48	105
49	52
50	82
51	65
52	87
53	51
54	105
55	65
56	105
57	73
58	83
59	57
60	145

n	a(n)
1	0
2	0
3	1
4	2
5	3
6	5
7	5
8	8
9	8
10	11
11	9
12	17
13	11
14	17
15	17
16	22
17	15
18	28
19	17
20	31
21	25
22	29
23	21
24	45
25	26
26	35
27	33
28	45
29	27
30	57
31	29
32	52
33	41
34	47
35	41
36	74
37	35
38	53
39	49
40	75
41	39
42	81
43	41
44	73
45	67
46	65
47	45
48	105
49	52
50	82
51	65
52	87
53	51
54	105
55	65
56	105
57	73
58	83
59	57
60	145

n	a(n)
1	0
2	0
3	1
4	2
5	3
6	5
7	5
8	8
9	8
10	11
11	9
12	17
13	11
14	17
15	17
16	22
17	15
18	28
19	17
20	31
21	25
22	29
23	21
24	45
25	26
26	35
27	33
28	45
29	27
30	57
31	29
32	52
33	41
34	47
35	41
36	74
37	35
38	53
39	49
40	75
41	39
42	81
43	41
44	73
45	67
46	65
47	45
48	105
49	52
50	82
51	65
52	87
53	51
54	105
55	65
56	105
57	73
58	83
59	57
60	145