A070237 - cp's OEIS frontend

A070237 Numbers k such that the sign of core(k)-phi(k) is not equal to 2*mu(k)^2-1, where core(k) is the squarefree part of k.

n	a(n)
1	1
2	420
3	660
4	780
5	840
6	1320
7	1560
8	4620
9	5460
10	7140
11	7980
12	8580
13	9240
14	9660
15	10920
16	11220
17	12012
18	12180
19	12540
20	13020
21	13260
22	14280
23	14820
24	15180
25	15540
26	15708
27	15960
28	17160
29	17220
30	17556
31	17940
32	18060
33	18564
34	19140
35	19320
36	19380
37	19740

[1, 420, 660, 780, 840, 1320, 1560, 4620, 5460, 7140, 7980, 8580, 9240, 9660, 10920, 11220, 12012, 12180, 12540, 13020, 13260, 14280, 14820, 15180, 15540, 15708, 15960, 17160, 17220, 17556, 17940, 18060, 18564, 19140, 19320, 19380, 19740]

cp's OEIS Frontend

A070237 Numbers k such that the sign of core(k)-phi(k) is not equal to 2*mu(k)^2-1, where core(k) is the squarefree part of k.

Table of values

List of values