A303646 - cp's OEIS frontend

A303646 a(n) is the number of lattice points in a Cartesian grid between a square with integer sides 2*n and its inscribed circle. The sides of the square are parallel to the bisector of coordinate axes.

n	a(n)
1	0
2	0
3	12
4	12
5	32
6	32
7	32
8	68
9	60
10	104
11	104
12	104
13	156
14	148
15	216
16	216
17	300
18	292
19	276
20	368
21	368
22	468
23	460
24	452
25	560
26	544
27	676
28	668
29	816
30	792
31	784
32	932
33	916
34	1080
35	1048
36	1048
37	1220
38	1212
39	1384
40	1360
41	1352
42	1556
43	1532
44	1736
45	1704
46	1956
47	1924
48	1900
49	2136
50	2096
51	2340
52	2308

[0, 0, 12, 12, 32, 32, 32, 68, 60, 104, 104, 104, 156, 148, 216, 216, 300, 292, 276, 368, 368, 468, 460, 452, 560, 544, 676, 668, 816, 792, 784, 932, 916, 1080, 1048, 1048, 1220, 1212, 1384, 1360, 1352, 1556, 1532, 1736, 1704, 1956, 1924, 1900, 2136, 2096, 2340, 2308]

cp's OEIS Frontend

A303646 a(n) is the number of lattice points in a Cartesian grid between a square with integer sides 2*n and its inscribed circle. The sides of the square are parallel to the bisector of coordinate axes.

Table of values

List of values