A053456 - cp's OEIS frontend

A053456 Open disk numbers (version 1): a(n) is the number of points (i,j), i,j, integers, contained in an open disk of diameter n, centered at (0,0).

n	a(n)
0	0
1	1
2	1
3	9
4	9
5	21
6	25
7	37
8	45
9	69
10	69
11	97
12	109
13	137
14	145
15	177
16	193
17	225
18	249
19	293
20	305
21	349
22	373
23	421
24	437
25	489
26	517
27	577
28	609
29	665
30	697
31	749
32	793
33	861
34	889
35	973
36	1005
37	1085
38	1125
39	1201
40	1245
41	1313
42	1369
43	1457
44	1513
45	1597
46	1649
47	1741
48	1789
49	1885
50	1941

[0, 1, 1, 9, 9, 21, 25, 37, 45, 69, 69, 97, 109, 137, 145, 177, 193, 225, 249, 293, 305, 349, 373, 421, 437, 489, 517, 577, 609, 665, 697, 749, 793, 861, 889, 973, 1005, 1085, 1125, 1201, 1245, 1313, 1369, 1457, 1513, 1597, 1649, 1741, 1789, 1885, 1941]

cp's OEIS Frontend

A053456 Open disk numbers (version 1): a(n) is the number of points (i,j), i,j, integers, contained in an open disk of diameter n, centered at (0,0).

Table of values

List of values