A177404 - cp's OEIS frontend

A177404 Numbers n such that n^2 minus (sum of the squares of the proper divisors of n) is a prime number.

n	a(n)
1	2
2	4
3	8
4	9
5	18
6	25
7	32
8	49
9	64
10	72
11	81
12	100
13	121
14	162
15	242
16	256
17	289
18	361
19	392
20	400
21	484
22	512
23	529
24	576
25	648
26	729
27	784
28	1058
29	1296
30	1352
31	1444
32	1681
33	1849
34	1922
35	2048
36	2116
37	2500
38	3136
39	3872
40	4418
41	4608
42	4624
43	5184
44	5776
45	5832
46	6889
47	7225
48	7396
49	7744

[2, 4, 8, 9, 18, 25, 32, 49, 64, 72, 81, 100, 121, 162, 242, 256, 289, 361, 392, 400, 484, 512, 529, 576, 648, 729, 784, 1058, 1296, 1352, 1444, 1681, 1849, 1922, 2048, 2116, 2500, 3136, 3872, 4418, 4608, 4624, 5184, 5776, 5832, 6889, 7225, 7396, 7744]

cp's OEIS Frontend

A177404 Numbers n such that n^2 minus (sum of the squares of the proper divisors of n) is a prime number.

Table of values

List of values