A272338 - cp's OEIS frontend

A272338 Numbers such that antisigma(n) mod sigma(n) = phi(n), where antisigma(n) is the sum of the numbers less than n that do not divide n, sigma(n) is the sum of the divisors of n and phi(n) is the Euler totient function of n.

n	a(n)
1	3
2	9
3	27
4	81
5	243
6	319
7	729
8	2187
9	3615
10	6561
11	8159
12	9807
13	19683
14	32791
15	59049
16	103679
17	177147
18	432864
19	531441
20	788852
21	871215
22	1594323
23	2779519
24	2826863
25	2858240
26	4782969
27	7213536
28	10036415
29	14348907
30	20428863
31	24423359
32	29036799
33	33385279
34	43046721

[3, 9, 27, 81, 243, 319, 729, 2187, 3615, 6561, 8159, 9807, 19683, 32791, 59049, 103679, 177147, 432864, 531441, 788852, 871215, 1594323, 2779519, 2826863, 2858240, 4782969, 7213536, 10036415, 14348907, 20428863, 24423359, 29036799, 33385279, 43046721]

cp's OEIS Frontend

A272338 Numbers such that antisigma(n) mod sigma(n) = phi(n), where antisigma(n) is the sum of the numbers less than n that do not divide n, sigma(n) is the sum of the divisors of n and phi(n) is the Euler totient function of n.

Table of values

List of values