A055503 - cp's OEIS frontend

A055503 Take n points in general position in the plane; draw all the (infinite) straight lines joining them; sequence gives number of connected regions formed.

n	a(n)
0	1
1	1
2	2
3	7
4	18
5	41
6	85
7	162
8	287
9	478
10	756
11	1145
12	1672
13	2367
14	3263
15	4396
16	5805
17	7532
18	9622
19	12123
20	15086
21	18565
22	22617
23	27302
24	32683
25	38826
26	45800
27	53677
28	62532
29	72443
30	83491
31	95760
32	109337
33	124312
34	140778
35	158831
36	178570
37	200097
38	223517
39	248938
40	276471

[1, 1, 2, 7, 18, 41, 85, 162, 287, 478, 756, 1145, 1672, 2367, 3263, 4396, 5805, 7532, 9622, 12123, 15086, 18565, 22617, 27302, 32683, 38826, 45800, 53677, 62532, 72443, 83491, 95760, 109337, 124312, 140778, 158831, 178570, 200097, 223517, 248938, 276471]

cp's OEIS Frontend

A055503 Take n points in general position in the plane; draw all the (infinite) straight lines joining them; sequence gives number of connected regions formed.

Table of values

List of values