Number of plane partitions of n having exactly one row and one column, each of equal length.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =5a(6) =6a(7) =11a(8) =16a(9) =26a(10) =36a(11) =58a(12) =81a(13) =122a(14) =172a(15) =251a(16) =350a(17) =502a(18) =692a(19) =972a(20) =1332a(21) =1842a(22) =2499a(23) =3414a(24) =4592a(25) =6200a(26) =8277a(27) =11064a(28) =14656a(29) =19424