a(n) = A000085(4*n+3)/2^(n+2).A316333a(n) = A000085(4*n+3)/2^(n+2).Terms a(0) =1a(1) =29a(2) =2231a(3) =323423a(4) =75151585a(5) =25451905333External referencesoeis: A316333