A378450 - cp's OEIS frontend

A378450 a(n) is the number of positive numbers k <= sigma(n) that are not a sum of any subset of distinct divisors of n.

n	a(n)
1	0
2	0
3	1
4	0
5	3
6	0
7	5
8	0
9	6
10	3
11	9
12	0
13	11
14	9
15	9
16	0
17	15
18	0
19	17
20	0
21	17
22	21
23	21
24	0
25	24
26	27
27	25
28	0
29	27
30	0
31	29
32	0
33	33
34	39
35	33
36	0
37	35
38	45
39	41
40	0
41	39
42	0
43	41
44	21
45	23
46	57
47	45
48	0
49	50
50	30
51	57
52	35
53	51
54	0
55	57
56	0
57	65
58	75
59	57
60	0
61	59
62	81
63	45
64	0
65	69
66	0
67	65
68	63
69	81
70	2
71	69
72	0
73	71
74	99
75	61
76	77
77	81
78	0
79	77
80	0
81	90
82	111
83	81
84	0
85	93
86	117
87	105

[0, 0, 1, 0, 3, 0, 5, 0, 6, 3, 9, 0, 11, 9, 9, 0, 15, 0, 17, 0, 17, 21, 21, 0, 24, 27, 25, 0, 27, 0, 29, 0, 33, 39, 33, 0, 35, 45, 41, 0, 39, 0, 41, 21, 23, 57, 45, 0, 50, 30, 57, 35, 51, 0, 57, 0, 65, 75, 57, 0, 59, 81, 45, 0, 69, 0, 65, 63, 81, 2, 69, 0, 71, 99, 61, 77, 81, 0, 77, 0, 90, 111, 81, 0, 93, 117, 105]

cp's OEIS Frontend

A378450 a(n) is the number of positive numbers k <= sigma(n) that are not a sum of any subset of distinct divisors of n.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	0
5	3
6	0
7	5
8	0
9	6
10	3
11	9
12	0
13	11
14	9
15	9
16	0
17	15
18	0
19	17
20	0
21	17
22	21
23	21
24	0
25	24
26	27
27	25
28	0
29	27
30	0
31	29
32	0
33	33
34	39
35	33
36	0
37	35
38	45
39	41
40	0
41	39
42	0
43	41
44	21
45	23
46	57
47	45
48	0
49	50
50	30
51	57
52	35
53	51
54	0
55	57
56	0
57	65
58	75
59	57
60	0
61	59
62	81
63	45
64	0
65	69
66	0
67	65
68	63
69	81
70	2
71	69
72	0
73	71
74	99
75	61
76	77
77	81
78	0
79	77
80	0
81	90
82	111
83	81
84	0
85	93
86	117
87	105

n	a(n)
1	0
2	0
3	1
4	0
5	3
6	0
7	5
8	0
9	6
10	3
11	9
12	0
13	11
14	9
15	9
16	0
17	15
18	0
19	17
20	0
21	17
22	21
23	21
24	0
25	24
26	27
27	25
28	0
29	27
30	0
31	29
32	0
33	33
34	39
35	33
36	0
37	35
38	45
39	41
40	0
41	39
42	0
43	41
44	21
45	23
46	57
47	45
48	0
49	50
50	30
51	57
52	35
53	51
54	0
55	57
56	0
57	65
58	75
59	57
60	0
61	59
62	81
63	45
64	0
65	69
66	0
67	65
68	63
69	81
70	2
71	69
72	0
73	71
74	99
75	61
76	77
77	81
78	0
79	77
80	0
81	90
82	111
83	81
84	0
85	93
86	117
87	105

n	a(n)
1	0
2	0
3	1
4	0
5	3
6	0
7	5
8	0
9	6
10	3
11	9
12	0
13	11
14	9
15	9
16	0
17	15
18	0
19	17
20	0
21	17
22	21
23	21
24	0
25	24
26	27
27	25
28	0
29	27
30	0
31	29
32	0
33	33
34	39
35	33
36	0
37	35
38	45
39	41
40	0
41	39
42	0
43	41
44	21
45	23
46	57
47	45
48	0
49	50
50	30
51	57
52	35
53	51
54	0
55	57
56	0
57	65
58	75
59	57
60	0
61	59
62	81
63	45
64	0
65	69
66	0
67	65
68	63
69	81
70	2
71	69
72	0
73	71
74	99
75	61
76	77
77	81
78	0
79	77
80	0
81	90
82	111
83	81
84	0
85	93
86	117
87	105