A071340 - cp's OEIS frontend

A071340 a(n) = least positive r <= n such that the origin-centered circle of radius sqrt(r) touches A071339(n) lattice points.

n	a(n)
0	0
1	1
2	1
3	5
4	5
5	25
6	25
7	25
8	25
9	65
10	65
11	65
12	65
13	65
14	65
15	65
16	65
17	65
18	65
19	325
20	325
21	325
22	325
23	325
24	325
25	325
26	325
27	325
28	325
29	325
30	325
31	325
32	325
33	325
34	1105
35	1105
36	1105
37	1105
38	1105
39	1105
40	1105
41	1105
42	1105
43	1105
44	1105
45	1105
46	1105
47	1105
48	1105
49	1105
50	1105
51	1105
52	1105

[0, 1, 1, 5, 5, 25, 25, 25, 25, 65, 65, 65, 65, 65, 65, 65, 65, 65, 65, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 325, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105, 1105]

cp's OEIS Frontend

A071340 a(n) = least positive r <= n such that the origin-centered circle of radius sqrt(r) touches A071339(n) lattice points.

Table of values

List of values