A378980 - cp's OEIS frontend

A378980 Numbers k such that (A003961(k)-2*k) divides (A003961(k)-sigma(k)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1), and sigma is the sum of divisors function.

n	a(n)
1	1
2	2
3	3
4	4
5	6
6	7
7	10
8	25
9	26
10	28
11	33
12	46
13	55
14	57
15	69
16	91
17	93
18	496
19	1034
20	1054
21	1558
22	2211
23	2626
24	4825
25	8128
26	11222
27	12046
28	12639
29	28225
30	32043
31	68727
32	89575
33	970225
34	1392386
35	2245557
36	8550146
37	12371554
38	16322559
39	22799825
40	33550336
41	48980427
42	51326726
43	55037217
44	60406599
45	68258725
46	142901438
47	325422273
48	342534446

[1, 2, 3, 4, 6, 7, 10, 25, 26, 28, 33, 46, 55, 57, 69, 91, 93, 496, 1034, 1054, 1558, 2211, 2626, 4825, 8128, 11222, 12046, 12639, 28225, 32043, 68727, 89575, 970225, 1392386, 2245557, 8550146, 12371554, 16322559, 22799825, 33550336, 48980427, 51326726, 55037217, 60406599, 68258725, 142901438, 325422273, 342534446]

cp's OEIS Frontend

A378980 Numbers k such that (A003961(k)-2*k) divides (A003961(k)-sigma(k)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1), and sigma is the sum of divisors function.

Table of values

List of values