A258106 - cp's OEIS frontend

A258106 Number x such that sigma(x) = usigma(x) + (-1)sigma(x), where sigma(x) is the sum of divisors of x (A000203), usigma(x) is the sum of unitary divisors of x (A034448) and (-1)sigma(x) is defined in A049060.

n	a(n)
1	1998
2	3876
3	4524
4	10062
5	21582
6	45220
7	52780
8	85428
9	125976
10	226100
11	263900
12	271092
13	511428
14	597012
15	602946
16	839106
17	1033974
18	1130500
19	1274724
20	1280532
21	1319500
22	1435764
23	1469720
24	1575860
25	1810926
26	1895706
27	2171364
28	2550636
29	3162740
30	4083366
31	4766034
32	5652500

[1998, 3876, 4524, 10062, 21582, 45220, 52780, 85428, 125976, 226100, 263900, 271092, 511428, 597012, 602946, 839106, 1033974, 1130500, 1274724, 1280532, 1319500, 1435764, 1469720, 1575860, 1810926, 1895706, 2171364, 2550636, 3162740, 4083366, 4766034, 5652500]

cp's OEIS Frontend

A258106 Number x such that sigma(x) = usigma(x) + (-1)sigma(x), where sigma(x) is the sum of divisors of x (A000203), usigma(x) is the sum of unitary divisors of x (A034448) and (-1)sigma(x) is defined in A049060.

Table of values

List of values