A081378 - cp's OEIS frontend

A081378 Numbers k for which the sums of prime factors (ignoring multiplicity) of sigma(k) and phi(k) are equal but the sets of prime factors of sigma and phi are different.

n	a(n)
1	412
2	1142
3	1236
4	1328
5	1339
6	1703
7	2855
8	2875
9	2884
10	3406
11	3426
12	3668
13	3708
14	3984
15	4017
16	5109
17	5356
18	5710
19	5750
20	5924
21	6003
22	6281
23	6399
24	6413
25	6640
26	6812
27	7994
28	8054
29	8318
30	8515
31	8565
32	8611
33	8625
34	8652
35	8843
36	8858
37	9373
38	9707
39	9991

[412, 1142, 1236, 1328, 1339, 1703, 2855, 2875, 2884, 3406, 3426, 3668, 3708, 3984, 4017, 5109, 5356, 5710, 5750, 5924, 6003, 6281, 6399, 6413, 6640, 6812, 7994, 8054, 8318, 8515, 8565, 8611, 8625, 8652, 8843, 8858, 9373, 9707, 9991]

cp's OEIS Frontend

A081378 Numbers k for which the sums of prime factors (ignoring multiplicity) of sigma(k) and phi(k) are equal but the sets of prime factors of sigma and phi are different.

Table of values

List of values