a(n) = T(n,m) + T(n,m+1) + ... + T(n,n), m=[ (n+1)/2 ], T given by A026747.

Terms

a(0) =1a(1) =1a(2) =4a(3) =5a(4) =17a(5) =23a(6) =74a(7) =104a(8) =326a(9) =468a(10) =1447a(11) =2104a(12) =6459a(13) =9466a(14) =28968a(15) =42658a(16) =130473a(17) =192656a(18) =589993a(19) =872290a(20) =2678007a(21) =3960318a(22) =12199689a(23) =18032179a(24) =55769978a(25) =82346931a(26) =255807384a(27) =377172666a(28) =1177155945a(29) =1732702830