A129316 - cp's OEIS frontend

A129316 Positive integers k such that sopfr(k) divides sopfr(k+1), where sopfr(k) is the sum of the prime factors of k, counting multiplicity.

n	a(n)
1	5
2	8
3	15
4	77
5	125
6	160
7	252
8	496
9	714
10	948
11	980
12	1045
13	1053
14	1260
15	1330
16	1378
17	1404
18	1430
19	1508
20	1520
21	1610
22	1750
23	1862
24	1890
25	2170
26	2491
27	2680
28	2821
29	3094
30	3100
31	3248
32	3400
33	3591
34	3610
35	3652
36	3808
37	4185
38	4191
39	4384
40	4452
41	4500
42	4598
43	4906
44	5120
45	5145

[5, 8, 15, 77, 125, 160, 252, 496, 714, 948, 980, 1045, 1053, 1260, 1330, 1378, 1404, 1430, 1508, 1520, 1610, 1750, 1862, 1890, 2170, 2491, 2680, 2821, 3094, 3100, 3248, 3400, 3591, 3610, 3652, 3808, 4185, 4191, 4384, 4452, 4500, 4598, 4906, 5120, 5145]

cp's OEIS Frontend

A129316 Positive integers k such that sopfr(k) divides sopfr(k+1), where sopfr(k) is the sum of the prime factors of k, counting multiplicity.

Table of values

List of values