Number of pairs (p,q) of partitions of n such that the set of parts in q is a subset of the set of parts in p.

A369704

Number of pairs (p,q) of partitions of n such that the set of parts in q is a subset of the set of parts in p.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =13a(6) =28a(7) =43a(8) =84a(9) =137a(10) =243a(11) =372a(12) =684a(13) =1010a(14) =1702a(15) =2620a(16) =4256a(17) =6276a(18) =10134a(19) =14740a(20) =23094a(21) =33742a(22) =51139a(23) =73550a(24) =111303a(25) =158140a(26) =233006a(27) =331099a(28) =481324a(29) =674778

External references