A229275 - cp's OEIS frontend

A229275 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	10778
2	16471
3	17353
4	439453
5	1304443
6	3719678
7	9234253
8	17270678
9	20512335
10	21179143
11	50706307
12	77292313
13	95506557
14	103081993
15	104707029
16	140419077
17	240626953
18	287947933
19	822767689
20	982374757
21	1608154233
22	1918313911
23	2219891947
24	2471777007
25	2632397677

[10778, 16471, 17353, 439453, 1304443, 3719678, 9234253, 17270678, 20512335, 21179143, 50706307, 77292313, 95506557, 103081993, 104707029, 140419077, 240626953, 287947933, 822767689, 982374757, 1608154233, 1918313911, 2219891947, 2471777007, 2632397677]

cp's OEIS Frontend

A229275 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