A057961 - cp's OEIS frontend

A057961 Number of points in square lattice covered by a disc centered at (0,0) as its radius increases.

n	a(n)
1	1
2	5
3	9
4	13
5	21
6	25
7	29
8	37
9	45
10	49
11	57
12	61
13	69
14	81
15	89
16	97
17	101
18	109
19	113
20	121
21	129
22	137
23	145
24	149
25	161
26	169
27	177
28	185
29	193
30	197
31	213
32	221
33	225
34	233
35	241
36	249
37	253
38	261
39	277
40	285
41	293
42	301
43	305
44	317
45	325
46	333
47	341
48	349
49	357
50	365
51	373
52	377
53	385
54	401
55	405
56	421

[1, 5, 9, 13, 21, 25, 29, 37, 45, 49, 57, 61, 69, 81, 89, 97, 101, 109, 113, 121, 129, 137, 145, 149, 161, 169, 177, 185, 193, 197, 213, 221, 225, 233, 241, 249, 253, 261, 277, 285, 293, 301, 305, 317, 325, 333, 341, 349, 357, 365, 373, 377, 385, 401, 405, 421]

cp's OEIS Frontend

A057961 Number of points in square lattice covered by a disc centered at (0,0) as its radius increases.

Table of values

List of values

n	a(n)
1	1
2	5
3	9
4	13
5	21
6	25
7	29
8	37
9	45
10	49
11	57
12	61
13	69
14	81
15	89
16	97
17	101
18	109
19	113
20	121
21	129
22	137
23	145
24	149
25	161
26	169
27	177
28	185
29	193
30	197
31	213
32	221
33	225
34	233
35	241
36	249
37	253
38	261
39	277
40	285
41	293
42	301
43	305
44	317
45	325
46	333
47	341
48	349
49	357
50	365
51	373
52	377
53	385
54	401
55	405
56	421

n	a(n)
1	1
2	5
3	9
4	13
5	21
6	25
7	29
8	37
9	45
10	49
11	57
12	61
13	69
14	81
15	89
16	97
17	101
18	109
19	113
20	121
21	129
22	137
23	145
24	149
25	161
26	169
27	177
28	185
29	193
30	197
31	213
32	221
33	225
34	233
35	241
36	249
37	253
38	261
39	277
40	285
41	293
42	301
43	305
44	317
45	325
46	333
47	341
48	349
49	357
50	365
51	373
52	377
53	385
54	401
55	405
56	421

n	a(n)
1	1
2	5
3	9
4	13
5	21
6	25
7	29
8	37
9	45
10	49
11	57
12	61
13	69
14	81
15	89
16	97
17	101
18	109
19	113
20	121
21	129
22	137
23	145
24	149
25	161
26	169
27	177
28	185
29	193
30	197
31	213
32	221
33	225
34	233
35	241
36	249
37	253
38	261
39	277
40	285
41	293
42	301
43	305
44	317
45	325
46	333
47	341
48	349
49	357
50	365
51	373
52	377
53	385
54	401
55	405
56	421