Number of planar partitions of n, but partitions that are mirror images of each other (when regarded as 3-D objects) are counted only once.

A048140

Number of planar partitions of n, but partitions that are mirror images of each other (when regarded as 3-D objects) are counted only once.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =14a(5) =27a(6) =47a(7) =86a(8) =149a(9) =261a(10) =444a(11) =760a(12) =1269a(13) =2119a(14) =3486a(15) =5711a(16) =9247a(17) =14906a(18) =23800a(19) =37816a(20) =59622a(21) =93528a(22) =145759a(23) =226071a(24) =348612a(25) =535131a(26) =817280a(27) =1242824a(28) =1881310a(29) =2836377

External references