A218706 - cp's OEIS frontend

A218706 Number of nonnegative integer solutions to x^2 + 2y^2 <= n^2.

n	a(n)
0	1
1	2
2	5
3	9
4	12
5	19
6	27
7	33
8	42
9	54
10	66
11	77
12	91
13	105
14	120
15	138
16	156
17	175
18	197
19	218
20	240
21	263
22	287
23	314
24	339
25	367
26	398
27	430
28	459
29	493
30	526
31	556
32	595
33	637
34	670
35	709
36	752
37	794
38	833
39	878
40	921
41	965
42	1018
43	1065
44	1112
45	1163
46	1215
47	1266
48	1317
49	1370
50	1433
51	1492
52	1544

[1, 2, 5, 9, 12, 19, 27, 33, 42, 54, 66, 77, 91, 105, 120, 138, 156, 175, 197, 218, 240, 263, 287, 314, 339, 367, 398, 430, 459, 493, 526, 556, 595, 637, 670, 709, 752, 794, 833, 878, 921, 965, 1018, 1065, 1112, 1163, 1215, 1266, 1317, 1370, 1433, 1492, 1544]

cp's OEIS Frontend

A218706 Number of nonnegative integer solutions to x^2 + 2y^2 <= n^2.

Table of values

List of values