A270820 - cp's OEIS frontend

A270820 Prime powers p^k (p prime, k > 1) that are not of the form x^2 + y^2 + z^2 where x, y and z are integers.

n	a(n)
1	343
2	12167
3	16807
4	29791
5	103823
6	357911
7	493039
8	823543
9	1092727
10	2048383
11	3442951
12	4657463
13	6436343
14	6967871
15	7880599
16	11089567
17	13651919
18	18191447
19	19902511
20	28629151
21	30080231
22	40353607
23	46268279
24	49430863
25	56181887
26	80062991
27	84604519
28	99252847

[343, 12167, 16807, 29791, 103823, 357911, 493039, 823543, 1092727, 2048383, 3442951, 4657463, 6436343, 6967871, 7880599, 11089567, 13651919, 18191447, 19902511, 28629151, 30080231, 40353607, 46268279, 49430863, 56181887, 80062991, 84604519, 99252847]

cp's OEIS Frontend

A270820 Prime powers p^k (p prime, k > 1) that are not of the form x^2 + y^2 + z^2 where x, y and z are integers.

Table of values

List of values