a(n) = A014486(A179756(n)).

Terms

a(0) =56a(1) =228a(2) =932a(3) =3736a(4) =15512a(5) =62040a(6) =242264a(7) =969136a(8) =3985840a(9) =15943080a(10) =62096808a(11) =248388496a(12) =1021909904a(13) =4087635248a(14) =15883066672a(15) =63532285248a(16) =261545377088