Number of set partitions of [n] such that the maximal absolute difference between the least elements of consecutive blocks equals three.

A322876

Number of set partitions of [n] such that the maximal absolute difference between the least elements of consecutive blocks equals three.

Terms

    a(0) =0a(1) =1a(2) =7a(3) =39a(4) =209a(5) =1123a(6) =6153a(7) =34723a(8) =202852a(9) =1229672a(10) =7742792a(11) =50653678a(12) =344195782a(13) =2427812876a(14) =17761759538a(15) =134650690097

External references