A211340 - cp's OEIS frontend

A211340 Number of integer pairs (x,y) such that 1 and x^2+y^2<=n^2.

n	a(n)
1	0
2	1
3	3
4	5
5	9
6	13
7	17
8	23
9	30
10	38
11	45
12	53
13	64
14	74
15	86
16	97
17	110
18	123
19	138
20	154
21	168
22	186
23	203
24	220
25	241
26	261
27	282
28	302
29	324
30	348
31	370
32	396
33	421
34	448
35	476
36	501
37	531
38	558
39	591
40	622
41	651
42	684
43	717
44	753
45	788
46	821
47	858
48	894
49	933
50	973
51	1014
52	1054
53	1093
54	1135

[0, 1, 3, 5, 9, 13, 17, 23, 30, 38, 45, 53, 64, 74, 86, 97, 110, 123, 138, 154, 168, 186, 203, 220, 241, 261, 282, 302, 324, 348, 370, 396, 421, 448, 476, 501, 531, 558, 591, 622, 651, 684, 717, 753, 788, 821, 858, 894, 933, 973, 1014, 1054, 1093, 1135]

cp's OEIS Frontend

A211340 Number of integer pairs (x,y) such that 1 and x^2+y^2<=n^2.

Table of values

List of values