Number of symmetrical planar partitions of n (planar partitions (A000219) that when regarded as 3-D objects have just one symmetry plane).

A000784

Number of symmetrical planar partitions of n (planar partitions (A000219) that when regarded as 3-D objects have just one symmetry plane).

Terms

    a(0) =0a(1) =1a(2) =2a(3) =2a(4) =4a(5) =6a(6) =6a(7) =11a(8) =16a(9) =20a(10) =28a(11) =41a(12) =51a(13) =70a(14) =93a(15) =122a(16) =158a(17) =211a(18) =266a(19) =350a(20) =450a(21) =577a(22) =730a(23) =948a(24) =1186a(25) =1510a(26) =1901a(27) =2408a(28) =2999a(29) =3790

External references