Unlabeled version of A055203: number of different relations between n intervals (of nonzero length) on a line, up to permutation of intervals.
A121316
Unlabeled version of A055203: number of different relations between n intervals (of nonzero length) on a line, up to permutation of intervals.
Terms
- a(0) =1a(1) =1a(2) =7a(3) =75a(4) =1105a(5) =20821a(6) =478439a(7) =12977815a(8) =405909913a(9) =14382249193a(10) =569377926495
External references
- oeis: A121316