A218981 - cp's OEIS frontend

A218981 Numbers n for which sigma(n) = sigma(w) + sigma(x) + sigma(y) + sigma(z), where n = w + x + y + z, with w, x, y, z all positive.

n	a(n)
1	5
2	9
3	14
4	15
5	20
6	21
7	22
8	25
9	26
10	27
11	28
12	32
13	33
14	34
15	35
16	38
17	39
18	40
19	42
20	44
21	45
22	46
23	49
24	50
25	51
26	52
27	54
28	55
29	56
30	57
31	58
32	62
33	63
34	64
35	65
36	66
37	68
38	69
39	70
40	74
41	75
42	76
43	77
44	78
45	80
46	81
47	82
48	85
49	86
50	87
51	88
52	91
53	92
54	93
55	94
56	95
57	96
58	98
59	99
60	100

[5, 9, 14, 15, 20, 21, 22, 25, 26, 27, 28, 32, 33, 34, 35, 38, 39, 40, 42, 44, 45, 46, 49, 50, 51, 52, 54, 55, 56, 57, 58, 62, 63, 64, 65, 66, 68, 69, 70, 74, 75, 76, 77, 78, 80, 81, 82, 85, 86, 87, 88, 91, 92, 93, 94, 95, 96, 98, 99, 100]

cp's OEIS Frontend

A218981 Numbers n for which sigma(n) = sigma(w) + sigma(x) + sigma(y) + sigma(z), where n = w + x + y + z, with w, x, y, z all positive.

Table of values

List of values

n	a(n)
1	5
2	9
3	14
4	15
5	20
6	21
7	22
8	25
9	26
10	27
11	28
12	32
13	33
14	34
15	35
16	38
17	39
18	40
19	42
20	44
21	45
22	46
23	49
24	50
25	51
26	52
27	54
28	55
29	56
30	57
31	58
32	62
33	63
34	64
35	65
36	66
37	68
38	69
39	70
40	74
41	75
42	76
43	77
44	78
45	80
46	81
47	82
48	85
49	86
50	87
51	88
52	91
53	92
54	93
55	94
56	95
57	96
58	98
59	99
60	100

n	a(n)
1	5
2	9
3	14
4	15
5	20
6	21
7	22
8	25
9	26
10	27
11	28
12	32
13	33
14	34
15	35
16	38
17	39
18	40
19	42
20	44
21	45
22	46
23	49
24	50
25	51
26	52
27	54
28	55
29	56
30	57
31	58
32	62
33	63
34	64
35	65
36	66
37	68
38	69
39	70
40	74
41	75
42	76
43	77
44	78
45	80
46	81
47	82
48	85
49	86
50	87
51	88
52	91
53	92
54	93
55	94
56	95
57	96
58	98
59	99
60	100

n	a(n)
1	5
2	9
3	14
4	15
5	20
6	21
7	22
8	25
9	26
10	27
11	28
12	32
13	33
14	34
15	35
16	38
17	39
18	40
19	42
20	44
21	45
22	46
23	49
24	50
25	51
26	52
27	54
28	55
29	56
30	57
31	58
32	62
33	63
34	64
35	65
36	66
37	68
38	69
39	70
40	74
41	75
42	76
43	77
44	78
45	80
46	81
47	82
48	85
49	86
50	87
51	88
52	91
53	92
54	93
55	94
56	95
57	96
58	98
59	99
60	100