"AGK" (ordered, elements, unlabeled) transform of 2,2,2,2...

Terms

a(0) =2a(1) =4a(2) =10a(3) =24a(4) =42a(5) =104a(6) =206a(7) =376a(8) =838a(9) =1476a(10) =2838a(11) =5372a(12) =10394a(13) =17812a(14) =31522a(15) =61416a(16) =102642a(17) =185528a(18) =307862a(19) =550360a(20) =957118a(21) =1613028a(22) =2669310a(23) =4445900a(24) =7729826a(25) =12467524a(26) =21077242a(27) =33792120a(28) =54814218a(29) =89265752