A258077 - cp's OEIS frontend

A258077 Numbers x such that (-1)sigma(x) | sigma(x), where (-1)sigma(x) is defined in A049060 and sigma(x) is the sum of the divisors of x (A000203).

n	a(n)
1	1
2	2
3	3
4	6
5	14
6	15
7	30
8	35
9	42
10	70
11	78
12	105
13	190
14	210
15	348
16	357
17	418
18	570
19	714
20	812
21	910
22	1045
23	1254
24	2090
25	2436
26	2730
27	3135
28	4060
29	4522
30	4674
31	5278
32	6270
33	9990
34	10659
35	12180
36	12441
37	13566
38	14630
39	15834
40	16770
41	20026
42	21318
43	21978
44	23374
45	24244
46	24871
47	24882

[1, 2, 3, 6, 14, 15, 30, 35, 42, 70, 78, 105, 190, 210, 348, 357, 418, 570, 714, 812, 910, 1045, 1254, 2090, 2436, 2730, 3135, 4060, 4522, 4674, 5278, 6270, 9990, 10659, 12180, 12441, 13566, 14630, 15834, 16770, 20026, 21318, 21978, 23374, 24244, 24871, 24882]

cp's OEIS Frontend

A258077 Numbers x such that (-1)sigma(x) | sigma(x), where (-1)sigma(x) is defined in A049060 and sigma(x) is the sum of the divisors of x (A000203).

Table of values

List of values