A371374 - cp's OEIS frontend

A371374 Place n equally spaced points around the circumference of a circle and then, for each pair of points, draw two distinct circles, whose radii are the same as the first circle, such that both points lie on their circumferences. The sequence gives the total number of regions formed.

n	a(n)
1	1
2	1
3	9
4	9
5	51
6	48
7	211
8	217
9	612
10	651
11	1475
12	1248
13	3017
14	3193
15	5415
16	5793
17	9623
18	9000
19	15429
20	15901
21	23352
22	24311
23	34501
24	33840
25	49001
26	50337
27	67365
28	69385
29	91003
30	87720
31	120219
32	123169
33	155430
34	159291
35	198521
36	198792
37	250121
38	256121
39	310635
40	317441
41	382203
42	382032
43	465691
44	473573

[1, 1, 9, 9, 51, 48, 211, 217, 612, 651, 1475, 1248, 3017, 3193, 5415, 5793, 9623, 9000, 15429, 15901, 23352, 24311, 34501, 33840, 49001, 50337, 67365, 69385, 91003, 87720, 120219, 123169, 155430, 159291, 198521, 198792, 250121, 256121, 310635, 317441, 382203, 382032, 465691, 473573]

cp's OEIS Frontend

A371374 Place n equally spaced points around the circumference of a circle and then, for each pair of points, draw two distinct circles, whose radii are the same as the first circle, such that both points lie on their circumferences. The sequence gives the total number of regions formed.

Table of values

List of values