A328247 - cp's OEIS frontend

A328247 Numbers whose third arithmetic derivative (A099306) is a squarefree number (A005117), but the second derivative (A068346) is not.

n	a(n)
1	33
2	49
3	98
4	129
5	141
6	194
7	205
8	249
9	301
10	306
11	445
12	481
13	493
14	529
15	549
16	553
17	589
18	615
19	681
20	741
21	746
22	913
23	917
24	946
25	949
26	962
27	973
28	993
29	1010
30	1106
31	1273
32	1386
33	1397
34	1417
35	1430
36	1518
37	1561
38	1611
39	1633
40	1761
41	1802
42	1842
43	1849
44	1858
45	1870
46	1946
47	1957
48	1977
49	2030
50	2049
51	2078
52	2105
53	2139
54	2166
55	2170
56	2173
57	2175
58	2209
59	2223
60	2330

[33, 49, 98, 129, 141, 194, 205, 249, 301, 306, 445, 481, 493, 529, 549, 553, 589, 615, 681, 741, 746, 913, 917, 946, 949, 962, 973, 993, 1010, 1106, 1273, 1386, 1397, 1417, 1430, 1518, 1561, 1611, 1633, 1761, 1802, 1842, 1849, 1858, 1870, 1946, 1957, 1977, 2030, 2049, 2078, 2105, 2139, 2166, 2170, 2173, 2175, 2209, 2223, 2330]

cp's OEIS Frontend

A328247 Numbers whose third arithmetic derivative (A099306) is a squarefree number (A005117), but the second derivative (A068346) is not.

Table of values

List of values