Maximum number of trapezoids that can be formed by n lines in plane.
A037984
Maximum number of trapezoids that can be formed by n lines in plane.
Terms
- a(0) =1a(1) =5a(2) =15a(3) =31a(4) =60a(5) =108a(6) =171a(7) =264a(8) =396a(9) =556a(10) =770a(11) =1050a(12) =1375a(13) =1785a(14) =2295a(15) =2880a(16) =3600a(17) =4425a(18) =5395
External references
- oeis: A037984