3,2
J. E. Goodman and J. O'Rourke, editors, Handbook of Discrete and Computational Geometry, CRC Press, 1997, p. 102.
B. Gr\"{u}nbaum, Arrangements and Spreads. American Mathematical Society, Providence, RI, 1972, p. 4.
N. J. A. Sloane, Illustration of a(3) - a(6) [based on Fig. 2.1 of Gr\"{u}nbaum, 1972]
See A132346 for the sequence when we include the arrangement where the lines do pass through a common point, which is 1 greater than this.
Cf. A003036, A048873, A132346.
Sequence in context: A124436 A014221 * A105510 A155951 A118242 A006276
Adjacent sequences: A048869 A048870 A048871 * A048873 A048874 A048875
nonn,bref,nice,more
N. J. A. Sloane (njas(AT)research.att.com).
