A036701 - cp's OEIS frontend

A036701 a(n)=number of Gaussian integers z=a+bi satisfying n-1<|z|<=n, a>=0, 0<=b

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	4
6	4
7	5
8	6
9	7
10	8
11	8
12	8
13	11
14	11
15	12
16	11
17	13
18	14
19	15
20	16
21	15
22	18
23	17
24	18
25	21
26	20
27	21
28	21
29	22
30	24
31	23
32	26
33	25
34	27
35	29
36	25
37	30
38	28
39	33
40	31
41	30
42	33
43	33
44	36
45	36
46	33
47	37
48	37
49	39
50	40
51	41
52	41
53	39
54	42
55	42
56	46
57	43
58	46
59	45
60	47

[0, 1, 1, 2, 3, 4, 4, 5, 6, 7, 8, 8, 8, 11, 11, 12, 11, 13, 14, 15, 16, 15, 18, 17, 18, 21, 20, 21, 21, 22, 24, 23, 26, 25, 27, 29, 25, 30, 28, 33, 31, 30, 33, 33, 36, 36, 33, 37, 37, 39, 40, 41, 41, 39, 42, 42, 46, 43, 46, 45, 47]

cp's OEIS Frontend

A036701 a(n)=number of Gaussian integers z=a+bi satisfying n-1<|z|<=n, a>=0, 0<=b

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	4
6	4
7	5
8	6
9	7
10	8
11	8
12	8
13	11
14	11
15	12
16	11
17	13
18	14
19	15
20	16
21	15
22	18
23	17
24	18
25	21
26	20
27	21
28	21
29	22
30	24
31	23
32	26
33	25
34	27
35	29
36	25
37	30
38	28
39	33
40	31
41	30
42	33
43	33
44	36
45	36
46	33
47	37
48	37
49	39
50	40
51	41
52	41
53	39
54	42
55	42
56	46
57	43
58	46
59	45
60	47

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	4
6	4
7	5
8	6
9	7
10	8
11	8
12	8
13	11
14	11
15	12
16	11
17	13
18	14
19	15
20	16
21	15
22	18
23	17
24	18
25	21
26	20
27	21
28	21
29	22
30	24
31	23
32	26
33	25
34	27
35	29
36	25
37	30
38	28
39	33
40	31
41	30
42	33
43	33
44	36
45	36
46	33
47	37
48	37
49	39
50	40
51	41
52	41
53	39
54	42
55	42
56	46
57	43
58	46
59	45
60	47

n	a(n)
0	0
1	1
2	1
3	2
4	3
5	4
6	4
7	5
8	6
9	7
10	8
11	8
12	8
13	11
14	11
15	12
16	11
17	13
18	14
19	15
20	16
21	15
22	18
23	17
24	18
25	21
26	20
27	21
28	21
29	22
30	24
31	23
32	26
33	25
34	27
35	29
36	25
37	30
38	28
39	33
40	31
41	30
42	33
43	33
44	36
45	36
46	33
47	37
48	37
49	39
50	40
51	41
52	41
53	39
54	42
55	42
56	46
57	43
58	46
59	45
60	47