A283757 - cp's OEIS frontend

A283757 Numbers n such that phi(n) = Sum_{j=1..k} d(n^j) for some k, where phi(n) is the Euler totient function of n and d(n) is the number of divisors of n.

n	a(n)
1	1
2	3
3	8
4	10
5	18
6	24
7	30
8	435
9	485
10	579
11	678
12	759
13	1052
14	1593
15	3243
16	3857
17	3913
18	4085
19	4445
20	4773
21	4953
22	5685
23	6078
24	6278
25	6322
26	6836
27	7570
28	9823
29	10199
30	10703
31	12474
32	12913
33	12927
34	14180
35	14511
36	14623
37	16958
38	17013
39	17014
40	17174
41	17518
42	17966
43	18238
44	19334
45	19432

[1, 3, 8, 10, 18, 24, 30, 435, 485, 579, 678, 759, 1052, 1593, 3243, 3857, 3913, 4085, 4445, 4773, 4953, 5685, 6078, 6278, 6322, 6836, 7570, 9823, 10199, 10703, 12474, 12913, 12927, 14180, 14511, 14623, 16958, 17013, 17014, 17174, 17518, 17966, 18238, 19334, 19432]

cp's OEIS Frontend

A283757 Numbers n such that phi(n) = Sum_{j=1..k} d(n^j) for some k, where phi(n) is the Euler totient function of n and d(n) is the number of divisors of n.

Table of values

List of values