Number of equal-sized disjoint subset combinations from a set of n items.

A262875

Number of equal-sized disjoint subset combinations from a set of n items.

Terms

    a(0) =0a(1) =1a(2) =4a(3) =14a(4) =41a(5) =127a(6) =400a(7) =1297a(8) =4520a(9) =17064a(10) =64857a(11) =262286a(12) =1156325a(13) =5199261a(14) =23835336a(15) =117674608a(16) =609741279a(17) =3268286263a(18) =18109939168a(19) =102866828839a(20) =620474818814

External references