A019293 - cp's OEIS frontend

A019293 Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (4,k)-perfect numbers.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	8
7	10
8	12
9	15
10	18
11	21
12	24
13	26
14	32
15	39
16	42
17	60
18	65
19	72
20	84
21	96
22	160
23	182
24	336
25	455
26	512
27	672
28	896
29	960
30	992
31	1023
32	1280
33	1536
34	1848
35	2040
36	2688
37	4092
38	5472
39	5920
40	7808
41	7936
42	10416
43	11934
44	16352
45	16380
46	18720
47	20384
48	21824
49	23424
50	24564
51	29127
52	30240
53	33792
54	36720
55	41440

[1, 2, 3, 4, 6, 8, 10, 12, 15, 18, 21, 24, 26, 32, 39, 42, 60, 65, 72, 84, 96, 160, 182, 336, 455, 512, 672, 896, 960, 992, 1023, 1280, 1536, 1848, 2040, 2688, 4092, 5472, 5920, 7808, 7936, 10416, 11934, 16352, 16380, 18720, 20384, 21824, 23424, 24564, 29127, 30240, 33792, 36720, 41440]

cp's OEIS Frontend

A019293 Let sigma_m (n) be result of applying sum-of-divisors function m times to n; call n (m,k)-perfect if sigma_m (n) = k*n; sequence gives the (4,k)-perfect numbers.

Table of values

List of values