A211223 - cp's OEIS frontend

A211223 Numbers k for which sigma(k) = sigma(x) + sigma(y), where k = x + y.

n	a(n)
1	3
2	8
3	9
4	10
5	15
6	20
7	21
8	30
9	32
10	33
11	39
12	40
13	49
14	51
15	55
16	56
17	57
18	62
19	63
20	69
21	70
22	75
23	85
24	87
25	88
26	90
27	92
28	93
29	94
30	96
31	99
32	104
33	105
34	108
35	110
36	111
37	114
38	116
39	117
40	123
41	125
42	126
43	128
44	129
45	130
46	134
47	135
48	136
49	140
50	141
51	145
52	147
53	150
54	152
55	153
56	155
57	158
58	159
59	160

[3, 8, 9, 10, 15, 20, 21, 30, 32, 33, 39, 40, 49, 51, 55, 56, 57, 62, 63, 69, 70, 75, 85, 87, 88, 90, 92, 93, 94, 96, 99, 104, 105, 108, 110, 111, 114, 116, 117, 123, 125, 126, 128, 129, 130, 134, 135, 136, 140, 141, 145, 147, 150, 152, 153, 155, 158, 159, 160]

cp's OEIS Frontend

A211223 Numbers k for which sigma(k) = sigma(x) + sigma(y), where k = x + y.

Table of values

List of values

n	a(n)
1	3
2	8
3	9
4	10
5	15
6	20
7	21
8	30
9	32
10	33
11	39
12	40
13	49
14	51
15	55
16	56
17	57
18	62
19	63
20	69
21	70
22	75
23	85
24	87
25	88
26	90
27	92
28	93
29	94
30	96
31	99
32	104
33	105
34	108
35	110
36	111
37	114
38	116
39	117
40	123
41	125
42	126
43	128
44	129
45	130
46	134
47	135
48	136
49	140
50	141
51	145
52	147
53	150
54	152
55	153
56	155
57	158
58	159
59	160

n	a(n)
1	3
2	8
3	9
4	10
5	15
6	20
7	21
8	30
9	32
10	33
11	39
12	40
13	49
14	51
15	55
16	56
17	57
18	62
19	63
20	69
21	70
22	75
23	85
24	87
25	88
26	90
27	92
28	93
29	94
30	96
31	99
32	104
33	105
34	108
35	110
36	111
37	114
38	116
39	117
40	123
41	125
42	126
43	128
44	129
45	130
46	134
47	135
48	136
49	140
50	141
51	145
52	147
53	150
54	152
55	153
56	155
57	158
58	159
59	160

n	a(n)
1	3
2	8
3	9
4	10
5	15
6	20
7	21
8	30
9	32
10	33
11	39
12	40
13	49
14	51
15	55
16	56
17	57
18	62
19	63
20	69
21	70
22	75
23	85
24	87
25	88
26	90
27	92
28	93
29	94
30	96
31	99
32	104
33	105
34	108
35	110
36	111
37	114
38	116
39	117
40	123
41	125
42	126
43	128
44	129
45	130
46	134
47	135
48	136
49	140
50	141
51	145
52	147
53	150
54	152
55	153
56	155
57	158
58	159
59	160