A386205 - cp's OEIS frontend

A386205 Numbers k for which a solution to sigma_2(x) + sigma_2(k-x) = sigma_2(k) in positive integers exists.

n	a(n)
1	100
2	155
3	434
4	465
5	639
6	700
7	783
8	866
9	875
10	1085
11	1100
12	1300
13	1395
14	1700
15	1705
16	1900
17	2015
18	2170
19	2300
20	2625
21	2900
22	3100
23	3255
24	3565
25	3700
26	4100
27	4123
28	4185
29	4300
30	4473
31	4495
32	4700
33	4774
34	4900
35	5115
36	5300
37	5642
38	5735
39	5900
40	6045
41	6062
42	6100
43	6355
44	6665
45	6700
46	7100

[100, 155, 434, 465, 639, 700, 783, 866, 875, 1085, 1100, 1300, 1395, 1700, 1705, 1900, 2015, 2170, 2300, 2625, 2900, 3100, 3255, 3565, 3700, 4100, 4123, 4185, 4300, 4473, 4495, 4700, 4774, 4900, 5115, 5300, 5642, 5735, 5900, 6045, 6062, 6100, 6355, 6665, 6700, 7100]

cp's OEIS Frontend

A386205 Numbers k for which a solution to sigma_2(x) + sigma_2(k-x) = sigma_2(k) in positive integers exists.

Table of values

List of values