Number of set partitions of [n] where adjacent blocks differ in size.

A275313

Number of set partitions of [n] where adjacent blocks differ in size.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =4a(4) =7a(5) =23a(6) =100a(7) =333a(8) =1443a(9) =6910a(10) =36035a(11) =186958a(12) =1095251a(13) =6620976a(14) =42151463a(15) =290483173a(16) =2030271491a(17) =15044953241a(18) =116044969497a(19) =930056879535

External references