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 finite regions created in the resulting graph.
A386560
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 finite regions created in the resulting graph.
Terms
- a(0) =4a(1) =72a(2) =424a(3) =1396a(4) =3536a(5) =7292a(6) =14272a(7) =24332a(8) =39356a(9) =59920a(10) =91348a(11) =128084a(12) =182664a(13) =245804a(14) =323116a(15) =418552a(16) =547820a(17) =684680a(18) =869388a(19) =1060892a(20) =1289564a(21) =1560920
External references
- oeis: A386560