Number of multisets of gapless multisets whose multiset union is a size-n multiset covering an initial interval.

A356942

Number of multisets of gapless multisets whose multiset union is a size-n multiset covering an initial interval.

Terms

    a(0) =1a(1) =1a(2) =4a(3) =15a(4) =61a(5) =249a(6) =1040a(7) =4363a(8) =18424a(9) =78014a(10) =331099a(11) =1407080a(12) =5985505a(13) =25477399a(14) =108493103a(15) =462147381a(16) =1969025286a(17) =8390475609a(18) =35757524184a(19) =152398429323a(20) =649555719160

External references