a(n) = floor((2^prime(n+1))/Sum_{k=0|n,2^prime(k)}).

Terms

a(0) =2a(1) =2a(2) =2a(3) =11a(4) =3a(5) =12a(6) =3a(7) =12a(8) =59a(9) =3a(10) =51a(11) =15a(12) =3a(13) =12a(14) =59a(15) =62a(16) =3a(17) =51a(18) =15a(19) =3a(20) =50a(21) =15a(22) =60a(23) =251a(24) =15a(25) =3a(26) =12a(27) =3a(28) =12a(29) =15179