Number of plane partitions of n with at most two rows.

Terms

a(0) =1a(1) =1a(2) =3a(3) =5a(4) =10a(5) =16a(6) =29a(7) =45a(8) =75a(9) =115a(10) =181a(11) =271a(12) =413a(13) =605a(14) =895a(15) =1291a(16) =1866a(17) =2648a(18) =3760a(19) =5260a(20) =7352a(21) =10160a(22) =14008a(23) =19140a(24) =26085a(25) =35277a(26) =47575a(27) =63753a(28) =85175a(29) =113175