a(n) = A014486(A122238(n)).

Terms

a(0) =52a(1) =240a(2) =964a(3) =3972a(4) =15556a(5) =64532a(6) =248288a(7) =988964a(8) =4164356a(9) =15899248a(10) =64719124a(11) =257019652a(12) =1070118936a(13) =4197239188a(14) =16299415152a(15) =65592597568a(16) =259741591312