A337044 - cp's OEIS frontend

A337044 Numbers k such that both k and sigma(k)=A000203(k) are powerful, i.e., are terms of A001694.

n	a(n)
1	1
2	81
3	343
4	400
5	9261
6	27783
7	32400
8	137200
9	189728
10	224939
11	972000
12	1705636
13	2205472
14	3087000
15	3591200
16	3648100
17	3704400
18	7968032
19	11113200
20	13645088
21	15350724
22	15367968
23	18220059
24	21161304
25	24240600
26	25992000
27	26680500
28	29184800
29	32832900
30	48586824
31	51595489

[1, 81, 343, 400, 9261, 27783, 32400, 137200, 189728, 224939, 972000, 1705636, 2205472, 3087000, 3591200, 3648100, 3704400, 7968032, 11113200, 13645088, 15350724, 15367968, 18220059, 21161304, 24240600, 25992000, 26680500, 29184800, 32832900, 48586824, 51595489]

cp's OEIS Frontend

A337044 Numbers k such that both k and sigma(k)=A000203(k) are powerful, i.e., are terms of A001694.

Table of values

List of values