a(n) is the number of solid (3D) partitions of n with 2 layers and second layer a plane partition of 2.

A378854

a(n) is the number of solid (3D) partitions of n with 2 layers and second layer a plane partition of 2.

Terms

    a(0) =3a(1) =9a(2) =24a(3) =51a(4) =111a(5) =213a(6) =414a(7) =756a(8) =1374a(9) =2409a(10) =4206a(11) =7152a(12) =12096a(13) =20109a(14) =33198a(15) =54111a(16) =87648a(17) =140520a(18) =223953a(19) =354006a(20) =556419a(21) =868584a(22) =1348857a(23) =2082225a(24) =3198927a(25) =4888944a(26) =7438548a(27) =11265141a(28) =16990077a(29) =25516401

External references