A092586 - cp's OEIS frontend

A092586 Numbers k such that sigma(phi(k))-phi(sigma(k)) is nonzero and is divisible by (k+1), that is A065395(k)/(k+1) = (phi(sigma(k))-sigma(phi(k)))/(k+1) is a nonzero integer.

n	a(n)
1	7
2	87
3	231
4	463
5	617
6	691
7	751
8	855
9	1059
10	1127
11	2795
12	4819
13	11999
14	18527
15	22481
16	75311
17	121939
18	232901
19	256751
20	288883
21	313919
22	371519
23	845831
24	1285841
25	1762799
26	1815167
27	7195199
28	9096191
29	40324121
30	93070943
31	99388823
32	113140151
33	238072223
34	487394063

[7, 87, 231, 463, 617, 691, 751, 855, 1059, 1127, 2795, 4819, 11999, 18527, 22481, 75311, 121939, 232901, 256751, 288883, 313919, 371519, 845831, 1285841, 1762799, 1815167, 7195199, 9096191, 40324121, 93070943, 99388823, 113140151, 238072223, 487394063]

cp's OEIS Frontend

A092586 Numbers k such that sigma(phi(k))-phi(sigma(k)) is nonzero and is divisible by (k+1), that is A065395(k)/(k+1) = (phi(sigma(k))-sigma(phi(k)))/(k+1) is a nonzero integer.

Table of values

List of values