A347888 - cp's OEIS frontend

A347888 Odd numbers k for which A003415(sigma(k^2))-(k^2) is strictly positive and a multiple of six. Here A003415 is the arithmetic derivative.

n	a(n)
1	273
2	399
3	651
4	741
5	903
6	1209
7	1407
8	1533
9	1659
10	1677
11	1767
12	2037
13	2163
14	2331
15	2451
16	2457
17	2613
18	2667
19	2847
20	3003
21	3081
22	3297
23	3423
24	3591
25	3685
26	3783
27	3819
28	3843
29	3885
30	3999
31	4017
32	4095
33	4161
34	4179
35	4329
36	4345
37	4389
38	4431
39	4503
40	4683
41	4953
42	5061
43	5187
44	5529
45	5691
46	5817
47	5859
48	5871
49	5985
50	6123
51	6231
52	6279
53	6327
54	6357

[273, 399, 651, 741, 903, 1209, 1407, 1533, 1659, 1677, 1767, 2037, 2163, 2331, 2451, 2457, 2613, 2667, 2847, 3003, 3081, 3297, 3423, 3591, 3685, 3783, 3819, 3843, 3885, 3999, 4017, 4095, 4161, 4179, 4329, 4345, 4389, 4431, 4503, 4683, 4953, 5061, 5187, 5529, 5691, 5817, 5859, 5871, 5985, 6123, 6231, 6279, 6327, 6357]

cp's OEIS Frontend

A347888 Odd numbers k for which A003415(sigma(k^2))-(k^2) is strictly positive and a multiple of six. Here A003415 is the arithmetic derivative.

Table of values

List of values