A134600 - cp's OEIS frontend

A134600 Composite numbers such that the square mean of their prime factors is an integer (where the prime factors are taken with multiplicity and the square mean of c and d is sqrt((c^2+d^2)/2)).

n	a(n)
1	4
2	8
3	9
4	16
5	25
6	27
7	32
8	49
9	64
10	81
11	119
12	121
13	125
14	128
15	161
16	169
17	243
18	256
19	289
20	343
21	351
22	361
23	378
24	455
25	512
26	527
27	529
28	595
29	625
30	721
31	729
32	841
33	845
34	918
35	959
36	961
37	1024
38	1045
39	1081
40	1241
41	1265
42	1323
43	1331
44	1369
45	1375
46	1547
47	1615
48	1681
49	1792
50	1849
51	1855

[4, 8, 9, 16, 25, 27, 32, 49, 64, 81, 119, 121, 125, 128, 161, 169, 243, 256, 289, 343, 351, 361, 378, 455, 512, 527, 529, 595, 625, 721, 729, 841, 845, 918, 959, 961, 1024, 1045, 1081, 1241, 1265, 1323, 1331, 1369, 1375, 1547, 1615, 1681, 1792, 1849, 1855]

cp's OEIS Frontend

A134600 Composite numbers such that the square mean of their prime factors is an integer (where the prime factors are taken with multiplicity and the square mean of c and d is sqrt((c^2+d^2)/2)).

Table of values

List of values