login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A003036 Number of simplicial arrangements of n lines in the plane (the lines do not pass through a common point, all cells are triangles).
(Formerly M0223)
5
1, 1, 1, 2, 2, 2, 2, 4, 2, 4, 5, 5, 6 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,4

REFERENCES

J. E. Goodman and J. O'Rourke, editors, Handbook of Discrete and Computational Geometry, CRC Press, 1997, p. 102.

B. Grünbaum, Arrangements and Spreads. American Mathematical Society, Providence, RI, 1972, p. 7.

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=3..15.

CROSSREFS

Cf. A048872, A048873.

Sequence in context: A286575 A270438 A318836 * A089818 A067025 A049047

Adjacent sequences:  A003033 A003034 A003035 * A003037 A003038 A003039

KEYWORD

nonn,nice,more

AUTHOR

N. J. A. Sloane

STATUS

approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 14 01:41 EST 2019. Contains 329978 sequences. (Running on oeis4.)