a(n) = Sum_{i=0..floor((n+1)/2)} T(2i+1,n-2i-1) where T is A049615.

Terms

a(0) =0a(1) =0a(2) =0a(3) =3a(4) =4a(5) =11a(6) =14a(7) =26a(8) =30a(9) =49a(10) =56a(11) =82a(12) =92a(13) =126a(14) =138a(15) =184a(16) =200a(17) =256a(18) =276a(19) =343a(20) =366a(21) =449a(22) =478a(23) =574a(24) =608a(25) =720a(26) =758a(27) =889a(28) =934a(29) =1081