Number of set partitions of [n] into exactly five parts such that no part contains two elements with a circular distance less than three.
A261481
Number of set partitions of [n] into exactly five parts such that no part contains two elements with a circular distance less than three.
Terms
- a(0) =1a(1) =3a(2) =14a(3) =44a(4) =138a(5) =458a(6) =1397a(7) =4219a(8) =12974a(9) =39270a(10) =118004a(11) =355924a(12) =1071425a(13) =3217011a(14) =9662070a(15) =29016280a(16) =87083486a(17) =261322358a(18) =784185253a(19) =2352907211a(20) =7059288006a(21) =21179391714a(22) =63541238088a(23) =190628647440a(24) =571896993217
External references
- oeis: A261481