Largest (or middle) entry in row n of A099766.

Terms

a(0) =1a(1) =1a(2) =2a(3) =2a(4) =2a(5) =4a(6) =8a(7) =12a(8) =22a(9) =40a(10) =80a(11) =140a(12) =272a(13) =504a(14) =1008a(15) =1860a(16) =3698a(17) =6948a(18) =13896a(19) =26196a(20) =52312a(21) =99416a(22) =198832a(23) =379316a(24) =758360a(25) =1453312a(26) =2906624a(27) =5587704a(28) =11174400a(29) =21546672