A328305 - cp's OEIS frontend

A328305 Numbers that are cubefree, but not squarefree and whose first arithmetic derivative is not squarefree, but some k-th (with k >= 2) derivative is.

n	a(n)
1	50
2	99
3	207
4	306
5	531
6	549
7	725
8	747
9	819
10	931
11	1083
12	1175
13	1611
14	1775
15	1899
16	2057
17	2075
18	2299
19	2331
20	2367
21	2499
22	2525
23	2842
24	2853
25	2891
26	3425
27	3577
28	3610
29	3771
30	3789
31	3843
32	4059
33	4149
34	4311
35	4475
36	4575
37	4626
38	4693
39	4775
40	4998
41	5239
42	5274
43	5341
44	5547
45	5634
46	5706
47	5715
48	5746
49	5819
50	5949
51	6147
52	6223
53	6275
54	6381
55	6413
56	6475
57	6575

[50, 99, 207, 306, 531, 549, 725, 747, 819, 931, 1083, 1175, 1611, 1775, 1899, 2057, 2075, 2299, 2331, 2367, 2499, 2525, 2842, 2853, 2891, 3425, 3577, 3610, 3771, 3789, 3843, 4059, 4149, 4311, 4475, 4575, 4626, 4693, 4775, 4998, 5239, 5274, 5341, 5547, 5634, 5706, 5715, 5746, 5819, 5949, 6147, 6223, 6275, 6381, 6413, 6475, 6575]

cp's OEIS Frontend

A328305 Numbers that are cubefree, but not squarefree and whose first arithmetic derivative is not squarefree, but some k-th (with k >= 2) derivative is.

Table of values

List of values