Number of ways to select a subset s from an n-set and then partition s into blocks of equal size.

A262320

Number of ways to select a subset s from an n-set and then partition s into blocks of equal size.

Terms

    a(0) =1a(1) =2a(2) =5a(3) =12a(4) =30a(5) =73a(6) =191a(7) =528a(8) =1553a(9) =5032a(10) =18088a(11) =66905a(12) =266382a(13) =1164517a(14) =5215645a(15) =23868104a(16) =117740144a(17) =609872351a(18) =3268548407a(19) =18110463456a(20) =102867877415a(21) =620476915966

External references