A297365 - cp's OEIS frontend

A297365 Numbers k such that uphi(k)usigma(k) = uphi(k+1)usigma(k+1), where uphi is the unitary totient function (A047994) and usigma the sum of unitary divisors (A034448).

n	a(n)
1	5
2	11
3	19
4	71
5	247
6	271
7	991
8	2232
9	6200
10	8271
11	10295
12	16744
13	18496
14	18576
15	25704
16	26656
17	102175
18	122607
19	166624
20	225939
21	301103
22	747967
23	7237384
24	7302592
25	15760224
26	21770800
27	28121184
28	72967087
29	98617024
30	104577848
31	173859007
32	253496176
33	335610184
34	371191600

[5, 11, 19, 71, 247, 271, 991, 2232, 6200, 8271, 10295, 16744, 18496, 18576, 25704, 26656, 102175, 122607, 166624, 225939, 301103, 747967, 7237384, 7302592, 15760224, 21770800, 28121184, 72967087, 98617024, 104577848, 173859007, 253496176, 335610184, 371191600]

cp's OEIS Frontend

A297365 Numbers k such that uphi(k)usigma(k) = uphi(k+1)usigma(k+1), where uphi is the unitary totient function (A047994) and usigma the sum of unitary divisors (A034448).

Table of values

List of values

cp's OEIS Frontend

A297365 Numbers k such that uphi(k)*usigma(k) = uphi(k+1)*usigma(k+1), where uphi is the unitary totient function (A047994) and usigma the sum of unitary divisors (A034448).

Table of values

List of values

A297365 Numbers k such that uphi(k)usigma(k) = uphi(k+1)usigma(k+1), where uphi is the unitary totient function (A047994) and usigma the sum of unitary divisors (A034448).