A152864 - cp's OEIS frontend

A152864 Deficiency of n, plus the number of proper divisors of n: a(n) = 2n - sigma(n) + d(n) - 1.

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

[1, 2, 3, 3, 5, 3, 7, 4, 7, 5, 11, 1, 13, 7, 9, 5, 17, 2, 19, 3, 13, 11, 23, -5, 21, 13, 17, 5, 29, -5, 31, 6, 21, 17, 25, -11, 37, 19, 25, -3, 41, -5, 43, 9, 17, 23, 47, -19, 43, 12, 33, 11, 53, -5, 41, -1, 37, 29, 59, -37, 61, 31]

cp's OEIS Frontend

A152864 Deficiency of n, plus the number of proper divisors of n: a(n) = 2n - sigma(n) + d(n) - 1.

Table of values

List of values

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

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

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