Number of plane partitions of n where parts are colored in 2 colors.

Terms

a(0) =1a(1) =2a(2) =10a(3) =34a(4) =122a(5) =378a(6) =1242a(7) =3690a(8) =11266a(9) =32666a(10) =94994a(11) =267202a(12) =754546a(13) =2072578a(14) =5691514a(15) =15364290a(16) =41321962a(17) =109634586a(18) =290048746a(19) =758630698a(20) =1977954706a(21) =5111900410a(22) =13161995010a(23) =33645284962a(24) =85727394018a(25) =217042978882a(26) =547750831210