Number of rectangular plane partitions of n with no repeated rows or columns.

Terms

a(0) =1a(1) =1a(2) =1a(3) =3a(4) =3a(5) =6a(6) =8a(7) =13a(8) =15a(9) =28a(10) =33a(11) =52a(12) =69a(13) =101a(14) =133a(15) =202a(16) =256a(17) =369a(18) =506a(19) =688a(20) =935a(21) =1295a(22) =1736a(23) =2355a(24) =3184a(25) =4284a(26) =5745a(27) =7722a(28) =10281a(29) =13691