Number of different relations between n intervals (possibly of zero length) on a line.

A059516

Number of different relations between n intervals (possibly of zero length) on a line.

Terms

    a(0) =1a(1) =2a(2) =26a(3) =818a(4) =47834a(5) =4488722a(6) =617364026a(7) =117029670578

External references