A066785 - cp's OEIS frontend

A066785 Numbers k such that (k, phi(k), sigma(k)) lies on a sphere with integral radius centered at the origin, i.e., k^2 + phi(k)^2 + sigma(k)^2 is a square.

n	a(n)
1	603
2	1414
3	1444
4	2093
5	7434
6	12822
7	66584
8	66960
9	91000
10	138645
11	160130
12	167400
13	169212
14	210476
15	218592
16	229026
17	236572
18	265977
19	304128
20	344790
21	493722
22	618570
23	754110
24	950158
25	1091385
26	1113480
27	1760616
28	1761409
29	2116116
30	2733131
31	2776928

[603, 1414, 1444, 2093, 7434, 12822, 66584, 66960, 91000, 138645, 160130, 167400, 169212, 210476, 218592, 229026, 236572, 265977, 304128, 344790, 493722, 618570, 754110, 950158, 1091385, 1113480, 1760616, 1761409, 2116116, 2733131, 2776928]

cp's OEIS Frontend

A066785 Numbers k such that (k, phi(k), sigma(k)) lies on a sphere with integral radius centered at the origin, i.e., k^2 + phi(k)^2 + sigma(k)^2 is a square.

Table of values

List of values