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Search: id:A037984
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A037984 Maximum number of trapezoids that can be formed by n lines in plane. +0
1
1, 5, 15, 31, 60, 108, 171, 264, 396, 556, 770, 1050, 1375, 1785, 2295, 2880, 3600, 4425, 5395 (list; graph; listen)
OFFSET

4,2
CROSSREFS

Sequence in context: A133268 A056108 A055831 this_sequence A073361 A155013 A134887

Adjacent sequences: A037981 A037982 A037983 this_sequence A037985 A037986 A037987

KEYWORD

nonn

AUTHOR

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

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Last modified December 13 23:45 EST 2009. Contains 170824 sequences.

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