A229276 - cp's OEIS frontend

A229276 Composite squarefree numbers n such that p-tau(n) divides n+sigma(n), where p are the prime factors of n, tau(n) = A000005(n) and sigma(n) = A000203(n).

n	a(n)
1	6
2	10
3	15
4	66
5	145
6	231
7	435
8	1221
9	11571
10	99093
11	105502
12	292434
13	449854
14	585429
15	643858
16	968014
17	1372494
18	1787091
19	1939434
20	4659114
21	5524014
22	5654334
23	6250371
24	6974007
25	19495374
26	19821714
27	28488039
28	34701369
29	46183893
30	81133734
31	213352233
32	230140869

[6, 10, 15, 66, 145, 231, 435, 1221, 11571, 99093, 105502, 292434, 449854, 585429, 643858, 968014, 1372494, 1787091, 1939434, 4659114, 5524014, 5654334, 6250371, 6974007, 19495374, 19821714, 28488039, 34701369, 46183893, 81133734, 213352233, 230140869]

cp's OEIS Frontend

A229276 Composite squarefree numbers n such that p-tau(n) divides n+sigma(n), where p are the prime factors of n, tau(n) = A000005(n) and sigma(n) = A000203(n).

Table of values

List of values