A229088 - cp's OEIS frontend

A229088 Numbers k such that sigma(k) mod k = antisigma(k) mod k, where sigma(k) = A000203(k) = sum of divisors of k, antisigma(k) = A024816(k) = sum of non-divisors of k.

n	a(n)
1	1
2	4
3	40
4	224
5	360
6	2016
7	47616
8	174592
9	293760
10	524160
11	1571328
12	1782144
13	3485664
14	134209536
15	282977280
16	492101632
17	746444160
18	1459956960
19	1684126080
20	1716728832
21	4428914688
22	27298252800
23	41233360896
24	376591138560
25	719045268480
26	1622308746240

[1, 4, 40, 224, 360, 2016, 47616, 174592, 293760, 524160, 1571328, 1782144, 3485664, 134209536, 282977280, 492101632, 746444160, 1459956960, 1684126080, 1716728832, 4428914688, 27298252800, 41233360896, 376591138560, 719045268480, 1622308746240]

cp's OEIS Frontend

A229088 Numbers k such that sigma(k) mod k = antisigma(k) mod k, where sigma(k) = A000203(k) = sum of divisors of k, antisigma(k) = A024816(k) = sum of non-divisors of k.

Table of values

List of values