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

A322877

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

Terms

    a(0) =0a(1) =1a(2) =11a(3) =77a(4) =493a(5) =3124a(6) =20019a(7) =130916a(8) =878249a(9) =6063134a(10) =43144661a(11) =316670184a(12) =2397764986a(13) =18726889938a(14) =150814853887

External references