Number of unordered pairs (p,q) of distinct partitions of n such that the set of parts in q is equal to the set of parts in p.

A369697

Number of unordered pairs (p,q) of distinct partitions of n such that the set of parts in q is equal to the set of parts in p.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =0a(4) =0a(5) =1a(6) =1a(7) =4a(8) =5a(9) =12a(10) =19a(11) =35a(12) =53a(13) =91a(14) =136a(15) =225a(16) =325a(17) =505a(18) =741a(19) =1107a(20) =1590a(21) =2340a(22) =3313a(23) =4748a(24) =6682a(25) =9412a(26) =13091a(27) =18241a(28) =25080a(29) =34478

External references