a(n) = T(n,[ n/2 ]), where T is the array in A026148.

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =7a(5) =11a(6) =35a(7) =56a(8) =189a(9) =302a(10) =1038a(11) =1662a(12) =5796a(13) =9294a(14) =32734a(15) =52558a(16) =186494a(17) =299761a(18) =1069793a(19) =1721096a(20) =6170554a(21) =9934890a(22) =35752906a(23) =57601568a(24) =207940493a(25) =335201540a(26) =1213271620a(27) =1956754230a(28) =7098581115a(29) =11453394879