A386559 - cp's OEIS frontend

A386559 Place a point on the integer coordinates, up to |n|, along all four axial directions on a Cartesian plane, and then join an infinite straight line between every pair of points: a(n) is the number of points where lines intersect in the resulting graph.

n	a(n)
1	5
2	65
3	381
4	1213
5	3033
6	6105
7	12285
8	20789
9	33705
10	51065
11	79797
12	110817
13	161549
14	216985
15	284269
16	367925
17	489953
18	609225
19	785045
20	952877
21	1157749
22	1404473

[5, 65, 381, 1213, 3033, 6105, 12285, 20789, 33705, 51065, 79797, 110817, 161549, 216985, 284269, 367925, 489953, 609225, 785045, 952877, 1157749, 1404473]

cp's OEIS Frontend

A386559 Place a point on the integer coordinates, up to |n|, along all four axial directions on a Cartesian plane, and then join an infinite straight line between every pair of points: a(n) is the number of points where lines intersect in the resulting graph.

Table of values

List of values