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

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A037984 Maximum number of trapezoids that can be formed by n lines in plane. 0
1, 5, 15, 31, 60, 108, 171, 264, 396, 556, 770, 1050, 1375, 1785, 2295, 2880, 3600, 4425, 5395 (list; graph; refs; listen; history; internal format)
OFFSET

4,2

CROSSREFS

Sequence in context: A133268 A056108 A055831 * A073361 A155013 A134887

Adjacent sequences:  A037981 A037982 A037983 * A037985 A037986 A037987

KEYWORD

nonn

AUTHOR

Erich Friedman (erich.friedman(AT)stetson.edu)

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 15 18:53 EST 2012. Contains 205844 sequences.