A274356 - cp's OEIS frontend

A274356 Numbers n such that n^k is of the form (a^2 + b^4)/2 for all k > 0 (a, b > 0).

n	a(n)
1	1
2	5
3	16
4	25
5	41
6	80
7	81
8	125
9	256
10	400
11	405
12	425
13	625
14	656
15	841
16	1225
17	1280
18	1296
19	1681
20	2000
21	2025
22	2401
23	3125
24	3321
25	3721
26	4096
27	6400
28	6480
29	6561
30	6800
31	8281
32	8381
33	10000
34	10125
35	10496
36	12005
37	13456
38	14161
39	14641
40	15625
41	19600
42	20480
43	20736
44	25625

[1, 5, 16, 25, 41, 80, 81, 125, 256, 400, 405, 425, 625, 656, 841, 1225, 1280, 1296, 1681, 2000, 2025, 2401, 3125, 3321, 3721, 4096, 6400, 6480, 6561, 6800, 8281, 8381, 10000, 10125, 10496, 12005, 13456, 14161, 14641, 15625, 19600, 20480, 20736, 25625]

cp's OEIS Frontend

A274356 Numbers n such that n^k is of the form (a^2 + b^4)/2 for all k > 0 (a, b > 0).

Table of values

List of values