a(n) = A006046(A077465(n)).

Terms

a(0) =1a(1) =5a(2) =11a(3) =37a(4) =103a(5) =317a(6) =967a(7) =2869a(8) =8639a(9) =25853a(10) =77623a(11) =232997a(12) =698735a(13) =2096461a(14) =6288871a(15) =18867125a(16) =56600351a(17) =169802077a(18) =509408279a(19) =1528220741a(20) =4584666319a(21) =13753990765a(22) =41261980487a(23) =123785957845a(24) =371357840767