A211791 - cp's OEIS frontend

A211791 a(n) = Sum_{y=1..n} Sum_{x=1..n} floor((x^k + y^k)^(1/k)) with k = 2.

n	a(n)
1	1
2	7
3	23
4	54
5	103
6	175
7	276
8	409
9	579
10	791
11	1050
12	1360
13	1724
14	2149
15	2640
16	3198
17	3832
18	4543
19	5337
20	6217
21	7192
22	8265
23	9437
24	10716
25	12103
26	13609
27	15231
28	16978
29	18857
30	20869
31	23018
32	25307
33	27745
34	30337
35	33084
36	35992
37	39066
38	42309
39	45728

[1, 7, 23, 54, 103, 175, 276, 409, 579, 791, 1050, 1360, 1724, 2149, 2640, 3198, 3832, 4543, 5337, 6217, 7192, 8265, 9437, 10716, 12103, 13609, 15231, 16978, 18857, 20869, 23018, 25307, 27745, 30337, 33084, 35992, 39066, 42309, 45728]

cp's OEIS Frontend

A211791 a(n) = Sum_{y=1..n} Sum_{x=1..n} floor((x^k + y^k)^(1/k)) with k = 2.

Table of values

List of values