a(n) = A014486(A080068(n)).

Terms

a(0) =0a(1) =2a(2) =10a(3) =44a(4) =178a(5) =740a(6) =2868a(7) =11852a(8) =47522a(9) =190104a(10) =735842a(11) =3090116a(12) =11777124a(13) =48557252a(14) =194656036a(15) =778669672a(16) =3117617996a(17) =12677727330a(18) =49850271300a(19) =192901051976a(20) =795560529352