Arrangements of $1$ lines in the affine plane

The number of ways of arranging $1$ lines in the (affine) plane.

Updates

• Lower bound: $1$
  Reference unknown
  [via Number of ways of arranging n lines in the (affine) plane. - OEIS]
• Upper bound: $1$
  Reference unknown
  [via Number of ways of arranging n lines in the (affine) plane. - OEIS]