Dimension of n-th compound of a certain space.

Terms

a(0) =1a(1) =2a(2) =5a(3) =10a(4) =23a(5) =45a(6) =94a(7) =179a(8) =358a(9) =672a(10) =1292a(11) =2382a(12) =4470a(13) =8132a(14) =14937a(15) =26832a(16) =48507a(17) =86205a(18) =153717a(19) =270507a(20) =476896a(21) =832001a(22) =1452283a(23) =2513705a(24) =4350072a(25) =7475915a(26) =12838338a(27) =21919846a(28) =37385434a(29) =63450376