A184396 - cp's OEIS frontend

A184396 a(n) = number of numbers k <= sigma(n) such that k is not equal to sigma(d) for any divisor d of n, where sigma = A000203.

n	a(n)
1	0
2	1
3	2
4	4
5	4
6	8
7	6
8	11
9	10
10	14
11	10
12	22
13	12
14	20
15	20
16	26
17	16
18	33
19	18
20	36
21	28
22	32
23	22
24	52
25	28
26	38
27	36
28	50
29	28
30	64
31	30
32	57
33	44
34	50
35	44
36	82
37	36
38	56
39	52
40	82
41	40
42	88
43	42
44	78
45	72
46	68
47	46
48	114
49	54
50	87
51	68
52	92
53	52
54	112
55	68
56	112
57	76
58	86
59	58
60	156
61	60
62	92
63	98
64	120
65	80
66	137
67	66
68	120
69	92
70	136
71	70
72	183
73	72
74	110
75	118
76	134
77	92
78	160
79	78
80	176
81	116

[0, 1, 2, 4, 4, 8, 6, 11, 10, 14, 10, 22, 12, 20, 20, 26, 16, 33, 18, 36, 28, 32, 22, 52, 28, 38, 36, 50, 28, 64, 30, 57, 44, 50, 44, 82, 36, 56, 52, 82, 40, 88, 42, 78, 72, 68, 46, 114, 54, 87, 68, 92, 52, 112, 68, 112, 76, 86, 58, 156, 60, 92, 98, 120, 80, 137, 66, 120, 92, 136, 70, 183, 72, 110, 118, 134, 92, 160, 78, 176, 116]

cp's OEIS Frontend

A184396 a(n) = number of numbers k <= sigma(n) such that k is not equal to sigma(d) for any divisor d of n, where sigma = A000203.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	4
5	4
6	8
7	6
8	11
9	10
10	14
11	10
12	22
13	12
14	20
15	20
16	26
17	16
18	33
19	18
20	36
21	28
22	32
23	22
24	52
25	28
26	38
27	36
28	50
29	28
30	64
31	30
32	57
33	44
34	50
35	44
36	82
37	36
38	56
39	52
40	82
41	40
42	88
43	42
44	78
45	72
46	68
47	46
48	114
49	54
50	87
51	68
52	92
53	52
54	112
55	68
56	112
57	76
58	86
59	58
60	156
61	60
62	92
63	98
64	120
65	80
66	137
67	66
68	120
69	92
70	136
71	70
72	183
73	72
74	110
75	118
76	134
77	92
78	160
79	78
80	176
81	116

n	a(n)
1	0
2	1
3	2
4	4
5	4
6	8
7	6
8	11
9	10
10	14
11	10
12	22
13	12
14	20
15	20
16	26
17	16
18	33
19	18
20	36
21	28
22	32
23	22
24	52
25	28
26	38
27	36
28	50
29	28
30	64
31	30
32	57
33	44
34	50
35	44
36	82
37	36
38	56
39	52
40	82
41	40
42	88
43	42
44	78
45	72
46	68
47	46
48	114
49	54
50	87
51	68
52	92
53	52
54	112
55	68
56	112
57	76
58	86
59	58
60	156
61	60
62	92
63	98
64	120
65	80
66	137
67	66
68	120
69	92
70	136
71	70
72	183
73	72
74	110
75	118
76	134
77	92
78	160
79	78
80	176
81	116

n	a(n)
1	0
2	1
3	2
4	4
5	4
6	8
7	6
8	11
9	10
10	14
11	10
12	22
13	12
14	20
15	20
16	26
17	16
18	33
19	18
20	36
21	28
22	32
23	22
24	52
25	28
26	38
27	36
28	50
29	28
30	64
31	30
32	57
33	44
34	50
35	44
36	82
37	36
38	56
39	52
40	82
41	40
42	88
43	42
44	78
45	72
46	68
47	46
48	114
49	54
50	87
51	68
52	92
53	52
54	112
55	68
56	112
57	76
58	86
59	58
60	156
61	60
62	92
63	98
64	120
65	80
66	137
67	66
68	120
69	92
70	136
71	70
72	183
73	72
74	110
75	118
76	134
77	92
78	160
79	78
80	176
81	116